157820166 has 48 divisors (see below), whose sum is σ = 391742208. Its totient is φ = 44982000.

The previous prime is 157820147. The next prime is 157820203. The reversal of 157820166 is 661028751.

157820166 is a `hidden beast` number, since 1 + 578 + 20 + 1 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 157820166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60591 + ... + 63141.

It is an arithmetic number, because the mean of its divisors is an integer number (8161296).

Almost surely, 2^157820166 is an apocalyptic number.

157820166 is an abundant number, since it is smaller than the sum of its proper divisors (233922042).

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

157820166 is a wasteful number, since it uses less digits than its factorization.

157820166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057 (or 3054 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 157820166 is about 12562.6496408998. The cubic root of 157820166 is about 540.4068333345.

The spelling of 157820166 in words is "one hundred fifty-seven million, eight hundred twenty thousand, one hundred sixty-six".