65620764 has 36 divisors (see below), whose sum is σ = 180955320. Its totient is φ = 19884960.

The previous prime is 65620759. The next prime is 65620783. The reversal of 65620764 is 46702656.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82459 + ... + 83250.

Almost surely, 2^65620764 is an apocalyptic number.

It is an amenable number.

65620764 is an abundant number, since it is smaller than the sum of its proper divisors (115334556).

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

65620764 is a wasteful number, since it uses less digits than its factorization.

65620764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165730 (or 165725 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 65620764 is about 8100.6644171944. The cubic root of 65620764 is about 403.3484826099.

The spelling of 65620764 in words is "sixty-five million, six hundred twenty thousand, seven hundred sixty-four".