166664043 has 48 divisors (see below), whose sum is σ = 302411200. Its totient is φ = 87889536.

The previous prime is 166664033. The next prime is 166664053. The reversal of 166664043 is 340466661.

It is an interprime number because it is at equal distance from previous prime (166664033) and next prime (166664053).

It is not a de Polignac number, because 166664043 - 2⁴ = 166664027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166663989 and 166664007.

It is not an unprimeable number, because it can be changed into a prime (166664033) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38055 + ... + 42207.

Almost surely, 2^166664043 is an apocalyptic number.

166664043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166664043 is a deficient number, since it is larger than the sum of its proper divisors (135747157).

166664043 is a wasteful number, since it uses less digits than its factorization.

166664043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193 (or 4176 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 166664043 is about 12909.8428727851. The cubic root of 166664043 is about 550.3183204151.

The spelling of 166664043 in words is "one hundred sixty-six million, six hundred sixty-four thousand, forty-three".