65117916 has 18 divisors (see below), whose sum is σ = 164603712. Its totient is φ = 21705960.

The previous prime is 65117909. The next prime is 65117929. The reversal of 65117916 is 61971156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1808831 = 65117916 / (6 + 5 + 1 + 1 + 7 + 9 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 904380 + ... + 904451.

Almost surely, 2^65117916 is an apocalyptic number.

It is an amenable number.

65117916 is an abundant number, since it is smaller than the sum of its proper divisors (99485796).

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

65117916 is a wasteful number, since it uses less digits than its factorization.

65117916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808841 (or 1808836 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 65117916 is about 8069.5672746437. The cubic root of 65117916 is about 402.3155612411.

The spelling of 65117916 in words is "sixty-five million, one hundred seventeen thousand, nine hundred sixteen".