662817400660 has 48 divisors (see below), whose sum is σ = 1413518810256. Its totient is φ = 261025293312.

The previous prime is 662817400633. The next prime is 662817400681. The reversal of 662817400660 is 66004718266.

It can be written as a sum of positive squares in 8 ways, for example, as 68359824 + 662749040836 = 8268^2 + 814094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 662817400660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405694 + ... + 1220746.

It is an arithmetic number, because the mean of its divisors is an integer number (29448308547).

Almost surely, 2^662817400660 is an apocalyptic number.

It is an amenable number.

662817400660 is an abundant number, since it is smaller than the sum of its proper divisors (750701409596).

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

662817400660 is a wasteful number, since it uses less digits than its factorization.

662817400660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815692 (or 815690 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 662817400660 in words is "six hundred sixty-two billion, eight hundred seventeen million, four hundred thousand, six hundred sixty".