65969904 has 160 divisors (see below), whose sum is σ = 228985344. Its totient is φ = 15805440.

The previous prime is 65969903. The next prime is 65969921. The reversal of 65969904 is 40996956.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65969903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47362 + ... + 48734.

Almost surely, 2^65969904 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 65969904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114492672).

65969904 is an abundant number, since it is smaller than the sum of its proper divisors (163015440).

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

65969904 is a wasteful number, since it uses less digits than its factorization.

65969904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1409 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 65969904 is about 8122.1859126715. The cubic root of 65969904 is about 404.0625658747.

It can be divided in two parts, 65 and 969904, that added together give a palindrome (969969).

The spelling of 65969904 in words is "sixty-five million, nine hundred sixty-nine thousand, nine hundred four".