166899842258 has 6 divisors (see below), whose sum is σ = 250350630021. Its totient is φ = 83449632252.

The previous prime is 166899842227. The next prime is 166899842267. The reversal of 166899842258 is 852248998661.

It can be written as a sum of positive squares in 2 ways, for example, as 120119775889 + 46780066369 = 346583^2 + 216287^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=288877.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 433316 + ... + 722192.

Almost surely, 2^166899842258 is an apocalyptic number.

166899842258 is a deficient number, since it is larger than the sum of its proper divisors (83450787763).

166899842258 is an frugal number, since it uses more digits than its factorization.

166899842258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577756 (or 288879 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 68.

The spelling of 166899842258 in words is "one hundred sixty-six billion, eight hundred ninety-nine million, eight hundred forty-two thousand, two hundred fifty-eight".