166656842898 has 64 divisors (see below), whose sum is σ = 410650877952. Its totient is φ = 43908598080.

The previous prime is 166656842789. The next prime is 166656842899. The reversal of 166656842898 is 898248656661.

It is not an unprimeable number, because it can be changed into a prime (166656842899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381463 + ... + 691973.

It is an arithmetic number, because the mean of its divisors is an integer number (6416419968).

Almost surely, 2^166656842898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166656842898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205325438976).

166656842898 is an abundant number, since it is smaller than the sum of its proper divisors (243994035054).

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

166656842898 is a wasteful number, since it uses less digits than its factorization.

166656842898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311519.

The product of its digits is 238878720, while the sum is 69.

The spelling of 166656842898 in words is "one hundred sixty-six billion, six hundred fifty-six million, eight hundred forty-two thousand, eight hundred ninety-eight".