64997696 has 28 divisors (see below), whose sum is σ = 131102100. Its totient is φ = 31964160.

The previous prime is 64997687. The next prime is 64997707. The reversal of 64997696 is 69679946.

It can be written as a sum of positive squares in 2 ways, for example, as 22278400 + 42719296 = 4720^2 + 6536^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4421 + ... + 12228.

Almost surely, 2^64997696 is an apocalyptic number.

It is an amenable number.

64997696 is an abundant number, since it is smaller than the sum of its proper divisors (66104404).

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

64997696 is a wasteful number, since it uses less digits than its factorization.

64997696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16722 (or 16712 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 56.

The square root of 64997696 is about 8062.1148590181. The cubic root of 64997696 is about 402.0678251606.

The spelling of 64997696 in words is "sixty-four million, nine hundred ninety-seven thousand, six hundred ninety-six".