166413885 has 32 divisors (see below), whose sum is σ = 292723200. Its totient is φ = 80059200.

The previous prime is 166413881. The next prime is 166413899. The reversal of 166413885 is 588314661.

It is not a de Polignac number, because 166413885 - 2² = 166413881 is a prime.

It is a super-2 number, since 2×166413885² = 55387162241586450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166413881) 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, 17766 + ... + 25464.

It is an arithmetic number, because the mean of its divisors is an integer number (9147600).

Almost surely, 2^166413885 is an apocalyptic number.

166413885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166413885 is a deficient number, since it is larger than the sum of its proper divisors (126309315).

166413885 is a wasteful number, since it uses less digits than its factorization.

166413885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7849.

The product of its digits is 138240, while the sum is 42.

The square root of 166413885 is about 12900.1505805165. The cubic root of 166413885 is about 550.0428451471.

The spelling of 166413885 in words is "one hundred sixty-six million, four hundred thirteen thousand, eight hundred eighty-five".