166740408 has 24 divisors (see below), whose sum is σ = 451588800. Its totient is φ = 55580112.

The previous prime is 166740407. The next prime is 166740419. The reversal of 166740408 is 804047661.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166740407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1157848 + ... + 1157991.

It is an arithmetic number, because the mean of its divisors is an integer number (18816200).

Almost surely, 2^166740408 is an apocalyptic number.

166740408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166740408 is an abundant number, since it is smaller than the sum of its proper divisors (284848392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166740408 is a wasteful number, since it uses less digits than its factorization.

166740408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315851 (or 2315844 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 166740408 is about 12912.8001610805. The cubic root of 166740408 is about 550.4023590212.

The spelling of 166740408 in words is "one hundred sixty-six million, seven hundred forty thousand, four hundred eight".