166624407 has 12 divisors (see below), whose sum is σ = 241411144. Its totient is φ = 110745360.

The previous prime is 166624399. The next prime is 166624453. The reversal of 166624407 is 704426661.

It is not a de Polignac number, because 166624407 - 2³ = 166624399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166624487) 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, 24988 + ... + 30945.

Almost surely, 2^166624407 is an apocalyptic number.

166624407 is a deficient number, since it is larger than the sum of its proper divisors (74786737).

166624407 is a wasteful number, since it uses less digits than its factorization.

166624407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56270 (or 56267 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 166624407 is about 12908.3076737425. The cubic root of 166624407 is about 550.2746914357.

The spelling of 166624407 in words is "one hundred sixty-six million, six hundred twenty-four thousand, four hundred seven".