138416668 has 24 divisors (see below), whose sum is σ = 272206368. Its totient is φ = 61106496.

The previous prime is 138416651. The next prime is 138416671. The reversal of 138416668 is 866614831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56671 + ... + 59062.

It is an arithmetic number, because the mean of its divisors is an integer number (11341932).

Almost surely, 2^138416668 is an apocalyptic number.

It is an amenable number.

138416668 is a deficient number, since it is larger than the sum of its proper divisors (133789700).

138416668 is a wasteful number, since it uses less digits than its factorization.

138416668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115773 (or 115771 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 138416668 is about 11765.0613258070. The cubic root of 138416668 is about 517.2844978538.

The spelling of 138416668 in words is "one hundred thirty-eight million, four hundred sixteen thousand, six hundred sixty-eight".