65655616 has 112 divisors (see below), whose sum is σ = 151570944. Its totient is φ = 27979776.

The previous prime is 65655607. The next prime is 65655631. The reversal of 65655616 is 61655656.

65655616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 899356 + ... + 899428.

It is an arithmetic number, because the mean of its divisors is an integer number (1353312).

Almost surely, 2^65655616 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 65655616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75785472).

65655616 is an abundant number, since it is smaller than the sum of its proper divisors (85915328).

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

65655616 is a wasteful number, since it uses less digits than its factorization.

65655616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 158 counting only the distinct ones).

The product of its digits is 162000, while the sum is 40.

The square root of 65655616 is about 8102.8153132106. The cubic root of 65655616 is about 403.4198777623.

Adding to 65655616 its sum of digits (40), we get a palindrome (65655656).

The spelling of 65655616 in words is "sixty-five million, six hundred fifty-five thousand, six hundred sixteen".