163866408 has 64 divisors (see below), whose sum is σ = 417331200. Its totient is φ = 53611200.

The previous prime is 163866397. The next prime is 163866413. The reversal of 163866408 is 804668361.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 163866408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373053 + ... + 373491.

It is an arithmetic number, because the mean of its divisors is an integer number (6520800).

Almost surely, 2^163866408 is an apocalyptic number.

It is an amenable number.

163866408 is an abundant number, since it is smaller than the sum of its proper divisors (253464792).

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

163866408 is a wasteful number, since it uses less digits than its factorization.

163866408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 163866408 is about 12801.0315209361. The cubic root of 163866408 is about 547.2217004749.

The spelling of 163866408 in words is "one hundred sixty-three million, eight hundred sixty-six thousand, four hundred eight".