166578159340 has 24 divisors (see below), whose sum is σ = 361876692240. Its totient is φ = 64333633728.

The previous prime is 166578159331. The next prime is 166578159383. The reversal of 166578159340 is 43951875661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143601282 + ... + 143602441.

It is an arithmetic number, because the mean of its divisors is an integer number (15078195510).

Almost surely, 2^166578159340 is an apocalyptic number.

166578159340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166578159340 is an abundant number, since it is smaller than the sum of its proper divisors (195298532900).

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

166578159340 is a wasteful number, since it uses less digits than its factorization.

166578159340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287203761 (or 287203759 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 166578159340 in words is "one hundred sixty-six billion, five hundred seventy-eight million, one hundred fifty-nine thousand, three hundred forty".