16659139 has 16 divisors (see below), whose sum is σ = 19742976. Its totient is φ = 13759200.

The previous prime is 16659127. The next prime is 16659163. The reversal of 16659139 is 93195661.

It is not a de Polignac number, because 16659139 - 2⁹ = 16658627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16659239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33684 + ... + 34174.

It is an arithmetic number, because the mean of its divisors is an integer number (1233936).

Almost surely, 2^16659139 is an apocalyptic number.

16659139 is a deficient number, since it is larger than the sum of its proper divisors (3083837).

16659139 is a wasteful number, since it uses less digits than its factorization.

16659139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its digits is 43740, while the sum is 40.

The square root of 16659139 is about 4081.5608533991. The cubic root of 16659139 is about 255.3980148601.

The spelling of 16659139 in words is "sixteen million, six hundred fifty-nine thousand, one hundred thirty-nine".