8139966402 has 16 divisors (see below), whose sum is σ = 16282674432. Its totient is φ = 2712865200.

The previous prime is 8139966383. The next prime is 8139966407. The reversal of 8139966402 is 2046699318.

It is not an unprimeable number, because it can be changed into a prime (8139966407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74578 + ... + 147789.

It is an arithmetic number, because the mean of its divisors is an integer number (1017667152).

Almost surely, 2^8139966402 is an apocalyptic number.

8139966402 is an abundant number, since it is smaller than the sum of its proper divisors (8142708030).

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

8139966402 is a wasteful number, since it uses less digits than its factorization.

8139966402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228473.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 8139966402 is about 90221.7623525500. The cubic root of 8139966402 is about 2011.5964974993.

The spelling of 8139966402 in words is "eight billion, one hundred thirty-nine million, nine hundred sixty-six thousand, four hundred two".