166604613 has 32 divisors (see below), whose sum is σ = 263761920. Its totient is φ = 91565760.

The previous prime is 166604611. The next prime is 166604629. The reversal of 166604613 is 316406661.

It is not a de Polignac number, because 166604613 - 2¹ = 166604611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166604611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56803 + ... + 59663.

It is an arithmetic number, because the mean of its divisors is an integer number (8242560).

Almost surely, 2^166604613 is an apocalyptic number.

It is an amenable number.

166604613 is a deficient number, since it is larger than the sum of its proper divisors (97157307).

166604613 is a wasteful number, since it uses less digits than its factorization.

166604613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 166604613 is about 12907.5409354377. The cubic root of 166604613 is about 550.2529007733.

The spelling of 166604613 in words is "one hundred sixty-six million, six hundred four thousand, six hundred thirteen".