166252666266 has 32 divisors (see below), whose sum is σ = 371306928000. Its totient is φ = 55139071680.

The previous prime is 166252666253. The next prime is 166252666277. The reversal of 166252666266 is 662666252661.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7724815 + ... + 7746306.

It is an arithmetic number, because the mean of its divisors is an integer number (11603341500).

Almost surely, 2^166252666266 is an apocalyptic number.

166252666266 is an abundant number, since it is smaller than the sum of its proper divisors (205054261734).

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

166252666266 is a wasteful number, since it uses less digits than its factorization.

166252666266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15471331 (or 15471325 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 54.

The spelling of 166252666266 in words is "one hundred sixty-six billion, two hundred fifty-two million, six hundred sixty-six thousand, two hundred sixty-six".