65739664 has 15 divisors (see below), whose sum is σ = 127433467. Its totient is φ = 32853616.

The previous prime is 65739659. The next prime is 65739673. The reversal of 65739664 is 46693756.

The square root of 65739664 is 8108.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31419 + ... + 33445.

Almost surely, 2^65739664 is an apocalyptic number.

65739664 is the 8108-th square number.

It is an amenable number.

65739664 is a deficient number, since it is larger than the sum of its proper divisors (61693803).

65739664 is an frugal number, since it uses more digits than its factorization.

65739664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062 (or 2029 counting only the distinct ones).

The product of its digits is 816480, while the sum is 46.

The cubic root of 65739664 is about 403.5919482207.

The spelling of 65739664 in words is "sixty-five million, seven hundred thirty-nine thousand, six hundred sixty-four".