139664670 has 32 divisors (see below), whose sum is σ = 335567232. Its totient is φ = 37202592.

The previous prime is 139664663. The next prime is 139664689. The reversal of 139664670 is 76466931.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32889 + ... + 36891.

It is an arithmetic number, because the mean of its divisors is an integer number (10486476).

Almost surely, 2^139664670 is an apocalyptic number.

139664670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139664670 is an abundant number, since it is smaller than the sum of its proper divisors (195902562).

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

139664670 is a wasteful number, since it uses less digits than its factorization.

139664670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5176.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 139664670 is about 11817.9807919966. The cubic root of 139664670 is about 518.8345075466.

It can be divided in two parts, 1396 and 64670, that added together give a palindrome (66066).

The spelling of 139664670 in words is "one hundred thirty-nine million, six hundred sixty-four thousand, six hundred seventy".