139966564 has 12 divisors (see below), whose sum is σ = 250153344. Its totient is φ = 68494184.

The previous prime is 139966553. The next prime is 139966571. The reversal of 139966564 is 465669931.

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 3 ways as a sum of consecutive naturals, for example, 372064 + ... + 372439.

It is an arithmetic number, because the mean of its divisors is an integer number (20846112).

Almost surely, 2^139966564 is an apocalyptic number.

It is an amenable number.

139966564 is a deficient number, since it is larger than the sum of its proper divisors (110186780).

139966564 is a wasteful number, since it uses less digits than its factorization.

139966564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744554 (or 744552 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 139966564 is about 11830.7465529442. The cubic root of 139966564 is about 519.2080696956.

The spelling of 139966564 in words is "one hundred thirty-nine million, nine hundred sixty-six thousand, five hundred sixty-four".