163664330 has 16 divisors (see below), whose sum is σ = 294847560. Its totient is φ = 65409792.

The previous prime is 163664329. The next prime is 163664377. The reversal of 163664330 is 33466361.

It can be written as a sum of positive squares in 4 ways, for example, as 132181009 + 31483321 = 11497^2 + 5611^2 .

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, 6542 + ... + 19238.

Almost surely, 2^163664330 is an apocalyptic number.

163664330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163664330 is a deficient number, since it is larger than the sum of its proper divisors (131183230).

163664330 is a wasteful number, since it uses less digits than its factorization.

163664330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13993.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 163664330 is about 12793.1360502419. The cubic root of 163664330 is about 546.9966656326.

The spelling of 163664330 in words is "one hundred sixty-three million, six hundred sixty-four thousand, three hundred thirty".