166225638260026 has 32 divisors (see below), whose sum is σ = 264622946620032. Its totient is φ = 78040926650880.

The previous prime is 166225638260023. The next prime is 166225638260047. The reversal of 166225638260026 is 620062836522661.

It is not an unprimeable number, because it can be changed into a prime (166225638260023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79645915 + ... + 81706321.

It is an arithmetic number, because the mean of its divisors is an integer number (8269467081876).

Almost surely, 2^{166225638260026} is an apocalyptic number.

166225638260026 is a deficient number, since it is larger than the sum of its proper divisors (98397308360006).

166225638260026 is a wasteful number, since it uses less digits than its factorization.

166225638260026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065974.

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 166225638260026 in words is "one hundred sixty-six trillion, two hundred twenty-five billion, six hundred thirty-eight million, two hundred sixty thousand, twenty-six".