664899837088 has 12 divisors (see below), whose sum is σ = 1309021554330. Its totient is φ = 332449918528.

The previous prime is 664899837067. The next prime is 664899837127. The reversal of 664899837088 is 880738998466.

664899837088 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 631815137424 + 33084699664 = 794868^2 + 181892^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10389059923 + ... + 10389059986.

Almost surely, 2^664899837088 is an apocalyptic number.

It is an amenable number.

664899837088 is a deficient number, since it is larger than the sum of its proper divisors (644121717242).

664899837088 is a wasteful number, since it uses less digits than its factorization.

664899837088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778119919 (or 20778119911 counting only the distinct ones).

The product of its (nonzero) digits is 1003290624, while the sum is 76.

The spelling of 664899837088 in words is "six hundred sixty-four billion, eight hundred ninety-nine million, eight hundred thirty-seven thousand, eighty-eight".