668173200 has 60 divisors (see below), whose sum is σ = 2140385328. Its totient is φ = 178179200.

The previous prime is 668173193. The next prime is 668173201. The reversal of 668173200 is 2371866.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (668173201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277206 + ... + 279605.

Almost surely, 2^668173200 is an apocalyptic number.

668173200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668173200 is an abundant number, since it is smaller than the sum of its proper divisors (1472212128).

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

668173200 is a wasteful number, since it uses less digits than its factorization.

668173200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556832 (or 556821 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 668173200 is about 25849.0464040746. The cubic root of 668173200 is about 874.2380087235.

The spelling of 668173200 in words is "six hundred sixty-eight million, one hundred seventy-three thousand, two hundred".