65916564 has 36 divisors (see below), whose sum is σ = 178917984. Its totient is φ = 18833136.

The previous prime is 65916559. The next prime is 65916569. The reversal of 65916564 is 46561956.

It is an interprime number because it is at equal distance from previous prime (65916559) and next prime (65916569).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65916569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55464 + ... + 56639.

It is an arithmetic number, because the mean of its divisors is an integer number (4969944).

Almost surely, 2^65916564 is an apocalyptic number.

It is an amenable number.

65916564 is an abundant number, since it is smaller than the sum of its proper divisors (113001420).

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

65916564 is a wasteful number, since it uses less digits than its factorization.

65916564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112124 (or 112115 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 65916564 is about 8118.9016498539. The cubic root of 65916564 is about 403.9536348451.

The spelling of 65916564 in words is "sixty-five million, nine hundred sixteen thousand, five hundred sixty-four".