65690208 has 144 divisors (see below), whose sum is σ = 200019456. Its totient is φ = 20401920.

The previous prime is 65690203. The next prime is 65690221. The reversal of 65690208 is 80209656.

65690208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65690203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311223 + ... + 311433.

It is an arithmetic number, because the mean of its divisors is an integer number (1389024).

Almost surely, 2^65690208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65690208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100009728).

65690208 is an abundant number, since it is smaller than the sum of its proper divisors (134329248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65690208 is a wasteful number, since it uses less digits than its factorization.

65690208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 65690208 is about 8104.9495988562. The cubic root of 65690208 is about 403.4907153191.

The spelling of 65690208 in words is "sixty-five million, six hundred ninety thousand, two hundred eight".