668161110 has 16 divisors (see below), whose sum is σ = 1603586736. Its totient is φ = 178176288.

The previous prime is 668161099. The next prime is 668161129. The reversal of 668161110 is 11161866.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 22272037 = 668161110 / (6 + 6 + 8 + 1 + 6 + 1 + 1 + 1 + 0).

It is a congruent number.

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, 11135989 + ... + 11136048.

It is an arithmetic number, because the mean of its divisors is an integer number (100224171).

Almost surely, 2^668161110 is an apocalyptic number.

668161110 is an abundant number, since it is smaller than the sum of its proper divisors (935425626).

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

668161110 is a wasteful number, since it uses less digits than its factorization.

668161110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22272047.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 668161110 is about 25848.8125452602. The cubic root of 668161110 is about 874.2327358385.

The spelling of 668161110 in words is "six hundred sixty-eight million, one hundred sixty-one thousand, one hundred ten".