166664051 has 8 divisors (see below), whose sum is σ = 169348608. Its totient is φ = 163989000.

The previous prime is 166664033. The next prime is 166664053. The reversal of 166664051 is 150466661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166664051 - 2²⁶ = 99555187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166664053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38486 + ... + 42596.

It is an arithmetic number, because the mean of its divisors is an integer number (21168576).

Almost surely, 2^166664051 is an apocalyptic number.

166664051 is a deficient number, since it is larger than the sum of its proper divisors (2684557).

166664051 is an equidigital number, since it uses as much as digits as its factorization.

166664051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4753.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 166664051 is about 12909.8431826262. The cubic root of 166664051 is about 550.3183292204.

The spelling of 166664051 in words is "one hundred sixty-six million, six hundred sixty-four thousand, fifty-one".