18156930666 has 32 divisors (see below), whose sum is σ = 41828352000. Its totient is φ = 5146844976.

The previous prime is 18156930637. The next prime is 18156930677. The reversal of 18156930666 is 66603965181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696666 + ... + 1707333.

It is an arithmetic number, because the mean of its divisors is an integer number (1307136000).

Almost surely, 2^18156930666 is an apocalyptic number.

18156930666 is an abundant number, since it is smaller than the sum of its proper divisors (23671421334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18156930666 is a wasteful number, since it uses less digits than its factorization.

18156930666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404138.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 18156930666 in words is "eighteen billion, one hundred fifty-six million, nine hundred thirty thousand, six hundred sixty-six".