139664680 has 16 divisors (see below), whose sum is σ = 314245620. Its totient is φ = 55865856.

The previous prime is 139664663. The next prime is 139664689. The reversal of 139664680 is 86466931.

It can be written as a sum of positive squares in 2 ways, for example, as 137311524 + 2353156 = 11718^2 + 1534^2 .

It is not an unprimeable number, because it can be changed into a prime (139664689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745769 + ... + 1745848.

Almost surely, 2^139664680 is an apocalyptic number.

139664680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139664680 is an abundant number, since it is smaller than the sum of its proper divisors (174580940).

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

139664680 is a wasteful number, since it uses less digits than its factorization.

139664680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491628 (or 3491624 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 139664680 is about 11817.9812150807. The cubic root of 139664680 is about 518.8345199295.

The spelling of 139664680 in words is "one hundred thirty-nine million, six hundred sixty-four thousand, six hundred eighty".