166415457 has 16 divisors (see below), whose sum is σ = 240787008. Its totient is φ = 101624640.

The previous prime is 166415449. The next prime is 166415497. The reversal of 166415457 is 754514661.

166415457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166415457 - 2³ = 166415449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (166415437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11178 + ... + 21395.

It is an arithmetic number, because the mean of its divisors is an integer number (15049188).

Almost surely, 2^166415457 is an apocalyptic number.

It is an amenable number.

166415457 is a deficient number, since it is larger than the sum of its proper divisors (74371551).

166415457 is a wasteful number, since it uses less digits than its factorization.

166415457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32720.

The product of its digits is 100800, while the sum is 39.

The square root of 166415457 is about 12900.2115098939. The cubic root of 166415457 is about 550.0445771032.

The spelling of 166415457 in words is "one hundred sixty-six million, four hundred fifteen thousand, four hundred fifty-seven".