166862491 has 16 divisors (see below), whose sum is σ = 179055360. Its totient is φ = 155151360.

The previous prime is 166862483. The next prime is 166862519. The reversal of 166862491 is 194268661.

It is a cyclic number.

It is not a de Polignac number, because 166862491 - 2³ = 166862483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166862461) 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, 281091 + ... + 281683.

It is an arithmetic number, because the mean of its divisors is an integer number (11190960).

Almost surely, 2^166862491 is an apocalyptic number.

166862491 is a deficient number, since it is larger than the sum of its proper divisors (12192869).

166862491 is a wasteful number, since it uses less digits than its factorization.

166862491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966.

The product of its digits is 124416, while the sum is 43.

The square root of 166862491 is about 12917.5265047144. The cubic root of 166862491 is about 550.5366563585.

The spelling of 166862491 in words is "one hundred sixty-six million, eight hundred sixty-two thousand, four hundred ninety-one".