65817867612 has 72 divisors (see below), whose sum is σ = 182803184256. Its totient is φ = 18367769952.

The previous prime is 65817867593. The next prime is 65817867613. The reversal of 65817867612 is 21676871856.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65817867613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1276288 + ... + 1326855.

Almost surely, 2^65817867612 is an apocalyptic number.

It is an amenable number.

65817867612 is an abundant number, since it is smaller than the sum of its proper divisors (116985316644).

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

65817867612 is a wasteful number, since it uses less digits than its factorization.

65817867612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603207 (or 2603198 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 57.

The spelling of 65817867612 in words is "sixty-five billion, eight hundred seventeen million, eight hundred sixty-seven thousand, six hundred twelve".