166370173226 has 16 divisors (see below), whose sum is σ = 264419967240. Its totient is φ = 78237035520.

The previous prime is 166370173217. The next prime is 166370173231. The reversal of 166370173226 is 622371073661.

It is a Cunningham number, because it is equal to 407885²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 129527290201 + 36842883025 = 359899^2 + 191945^2 .

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, 1663535 + ... + 1760706.

Almost surely, 2^166370173226 is an apocalyptic number.

166370173226 is a deficient number, since it is larger than the sum of its proper divisors (98049794014).

166370173226 is a wasteful number, since it uses less digits than its factorization.

166370173226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425689.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 166370173226 in words is "one hundred sixty-six billion, three hundred seventy million, one hundred seventy-three thousand, two hundred twenty-six".