65331800680 has 32 divisors (see below), whose sum is σ = 147042478440. Its totient is φ = 26124555520.

The previous prime is 65331800669. The next prime is 65331800693. The reversal of 65331800680 is 8600813356.

It can be written as a sum of positive squares in 4 ways, for example, as 62777306916 + 2554493764 = 250554^2 + 50542^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124699 + ... + 382378.

Almost surely, 2^65331800680 is an apocalyptic number.

It is an amenable number.

65331800680 is an abundant number, since it is smaller than the sum of its proper divisors (81710677760).

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

65331800680 is a wasteful number, since it uses less digits than its factorization.

65331800680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510309 (or 510305 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 65331800680 in words is "sixty-five billion, three hundred thirty-one million, eight hundred thousand, six hundred eighty".