138901066 has 8 divisors (see below), whose sum is σ = 208468800. Its totient is φ = 69411468.

The previous prime is 138901057. The next prime is 138901093. The reversal of 138901066 is 660109831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138901066² = 38587012271872712, which contains 22 as substring.

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, 14866 + ... + 22333.

It is an arithmetic number, because the mean of its divisors is an integer number (26058600).

Almost surely, 2^138901066 is an apocalyptic number.

138901066 is a deficient number, since it is larger than the sum of its proper divisors (69567734).

138901066 is a wasteful number, since it uses less digits than its factorization.

138901066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39068.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 138901066 is about 11785.6296395229. The cubic root of 138901066 is about 517.8872187295.

The spelling of 138901066 in words is "one hundred thirty-eight million, nine hundred one thousand, sixty-six".