18700166157 has 8 divisors (see below), whose sum is σ = 24934188576. Its totient is φ = 12466460592.

The previous prime is 18700166153. The next prime is 18700166159. The reversal of 18700166157 is 75166100781.

It is a happy number.

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

It is not a de Polignac number, because 18700166157 - 2² = 18700166153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18700166153) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 175578 + ... + 261204.

It is an arithmetic number, because the mean of its divisors is an integer number (3116773572).

Almost surely, 2^18700166157 is an apocalyptic number.

It is an amenable number.

18700166157 is a deficient number, since it is larger than the sum of its proper divisors (6234022419).

18700166157 is an equidigital number, since it uses as much as digits as its factorization.

18700166157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158427.

The product of its (nonzero) digits is 70560, while the sum is 42.

The spelling of 18700166157 in words is "eighteen billion, seven hundred million, one hundred sixty-six thousand, one hundred fifty-seven".