166630431 has 12 divisors (see below), whose sum is σ = 244208216. Its totient is φ = 100987920.

The previous prime is 166630427. The next prime is 166630439. The reversal of 166630431 is 134036661.

It is not a de Polignac number, because 166630431 - 2² = 166630427 is a prime.

It is a super-2 number, since 2×166630431² = 55531401070491522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166630439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229156 + ... + 229881.

Almost surely, 2^166630431 is an apocalyptic number.

166630431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166630431 is a deficient number, since it is larger than the sum of its proper divisors (77577785).

166630431 is a wasteful number, since it uses less digits than its factorization.

166630431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459062 (or 459051 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 166630431 is about 12908.5410097346. The cubic root of 166630431 is about 550.2813227467.

The spelling of 166630431 in words is "one hundred sixty-six million, six hundred thirty thousand, four hundred thirty-one".