65613760 has 28 divisors (see below), whose sum is σ = 156243528. Its totient is φ = 26245376.

The previous prime is 65613731. The next prime is 65613773. The reversal of 65613760 is 6731656.

It is a happy number.

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, 102202 + ... + 102841.

It is an arithmetic number, because the mean of its divisors is an integer number (5580126).

Almost surely, 2^65613760 is an apocalyptic number.

It is an amenable number.

65613760 is an abundant number, since it is smaller than the sum of its proper divisors (90629768).

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

65613760 is a wasteful number, since it uses less digits than its factorization.

65613760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205060 (or 205050 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 65613760 is about 8100.2320954402. The cubic root of 65613760 is about 403.3341316986.

The spelling of 65613760 in words is "sixty-five million, six hundred thirteen thousand, seven hundred sixty".