163662978 has 16 divisors (see below), whose sum is σ = 346580640. Its totient is φ = 51345216.

The previous prime is 163662953. The next prime is 163663001. The reversal of 163662978 is 879266361.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802168 + ... + 802371.

It is an arithmetic number, because the mean of its divisors is an integer number (21661290).

Almost surely, 2^163662978 is an apocalyptic number.

163662978 is an abundant number, since it is smaller than the sum of its proper divisors (182917662).

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

163662978 is a wasteful number, since it uses less digits than its factorization.

163662978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604561.

The product of its digits is 653184, while the sum is 48.

The square root of 163662978 is about 12793.0832092971. The cubic root of 163662978 is about 546.9951594165.

The spelling of 163662978 in words is "one hundred sixty-three million, six hundred sixty-two thousand, nine hundred seventy-eight".