660798680 has 16 divisors (see below), whose sum is σ = 1486797120. Its totient is φ = 264319456.

The previous prime is 660798667. The next prime is 660798731. The reversal of 660798680 is 86897066.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8259944 + ... + 8260023.

It is an arithmetic number, because the mean of its divisors is an integer number (92924820).

Almost surely, 2^660798680 is an apocalyptic number.

It is an amenable number.

660798680 is an abundant number, since it is smaller than the sum of its proper divisors (825998440).

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

660798680 is a wasteful number, since it uses less digits than its factorization.

660798680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16519978 (or 16519974 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 660798680 is about 25706.0047459733. The cubic root of 660798680 is about 871.0098284290.

It can be divided in two parts, 6607986 and 80, that added together give a palindrome (6608066).

The spelling of 660798680 in words is "six hundred sixty million, seven hundred ninety-eight thousand, six hundred eighty".