18837165666 has 32 divisors (see below), whose sum is σ = 41107062528. Its totient is φ = 5707149840.

The previous prime is 18837165647. The next prime is 18837165667. The reversal of 18837165666 is 66656173881.

It is not an unprimeable number, because it can be changed into a prime (18837165667) 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, 366825 + ... + 415011.

It is an arithmetic number, because the mean of its divisors is an integer number (1284595704).

Almost surely, 2^18837165666 is an apocalyptic number.

18837165666 is an abundant number, since it is smaller than the sum of its proper divisors (22269896862).

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

18837165666 is a wasteful number, since it uses less digits than its factorization.

18837165666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54126.

The product of its digits is 8709120, while the sum is 57.

The spelling of 18837165666 in words is "eighteen billion, eight hundred thirty-seven million, one hundred sixty-five thousand, six hundred sixty-six".