139275566 has 32 divisors (see below), whose sum is σ = 218557440. Its totient is φ = 66528000.

The previous prime is 139275559. The next prime is 139275569. The reversal of 139275566 is 665572931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139275569) by changing a digit.

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, 1096595 + ... + 1096721.

It is an arithmetic number, because the mean of its divisors is an integer number (6829920).

Almost surely, 2^139275566 is an apocalyptic number.

139275566 is a deficient number, since it is larger than the sum of its proper divisors (79281874).

139275566 is a wasteful number, since it uses less digits than its factorization.

139275566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its digits is 340200, while the sum is 44.

The square root of 139275566 is about 11801.5069376754. The cubic root of 139275566 is about 518.3522372825.

The spelling of 139275566 in words is "one hundred thirty-nine million, two hundred seventy-five thousand, five hundred sixty-six".