166164139 has 8 divisors (see below), whose sum is σ = 175145040. Its totient is φ = 157206816.

The previous prime is 166164107. The next prime is 166164179. The reversal of 166164139 is 931461661.

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 166164139 - 2⁵ = 166164107 is a prime.

It is a super-2 number, since 2×166164139² = 55221042179222642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166164098 and 166164107.

It is not an unprimeable number, because it can be changed into a prime (166164179) 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, 9657 + ... + 20629.

It is an arithmetic number, because the mean of its divisors is an integer number (21893130).

Almost surely, 2^166164139 is an apocalyptic number.

166164139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

166164139 is a deficient number, since it is larger than the sum of its proper divisors (8980901).

166164139 is a wasteful number, since it uses less digits than its factorization.

166164139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11789.

The product of its digits is 23328, while the sum is 37.

The square root of 166164139 is about 12890.4669814557. The cubic root of 166164139 is about 549.7675480514.

The spelling of 166164139 in words is "one hundred sixty-six million, one hundred sixty-four thousand, one hundred thirty-nine".