668231400 has 48 divisors (see below), whose sum is σ = 2071519200. Its totient is φ = 178194880.

The previous prime is 668231353. The next prime is 668231411. The reversal of 668231400 is 4132866.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556260 + ... + 557459.

It is an arithmetic number, because the mean of its divisors is an integer number (43156650).

Almost surely, 2^668231400 is an apocalyptic number.

668231400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668231400 is an abundant number, since it is smaller than the sum of its proper divisors (1403287800).

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

668231400 is a wasteful number, since it uses less digits than its factorization.

668231400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113738 (or 1113729 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 668231400 is about 25850.1721464287. The cubic root of 668231400 is about 874.2633909522.

The spelling of 668231400 in words is "six hundred sixty-eight million, two hundred thirty-one thousand, four hundred".