65918216 has 32 divisors (see below), whose sum is σ = 152120640. Its totient is φ = 26077248.

The previous prime is 65918213. The next prime is 65918221. The reversal of 65918216 is 61281956.

It is a super-2 number, since 2×65918216² = 8690422401245312, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65918216.

It is not an unprimeable number, because it can be changed into a prime (65918213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44546 + ... + 46001.

It is an arithmetic number, because the mean of its divisors is an integer number (4753770).

Almost surely, 2^65918216 is an apocalyptic number.

It is an amenable number.

65918216 is an abundant number, since it is smaller than the sum of its proper divisors (86202424).

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

65918216 is a wasteful number, since it uses less digits than its factorization.

65918216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90573 (or 90569 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 65918216 is about 8119.0033871159. The cubic root of 65918216 is about 403.9570094437.

The spelling of 65918216 in words is "sixty-five million, nine hundred eighteen thousand, two hundred sixteen".