668724468 has 24 divisors (see below), whose sum is σ = 1560857760. Its totient is φ = 222836640.

The previous prime is 668724449. The next prime is 668724481. The reversal of 668724468 is 864427866.

It is a self number, because there is not a number n which added to its sum of digits gives 668724468.

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, 41323 + ... + 55181.

It is an arithmetic number, because the mean of its divisors is an integer number (65035740).

Almost surely, 2^668724468 is an apocalyptic number.

It is an amenable number.

668724468 is an abundant number, since it is smaller than the sum of its proper divisors (892133292).

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

668724468 is a wasteful number, since it uses less digits than its factorization.

668724468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17887 (or 17885 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 51.

The square root of 668724468 is about 25859.7074229389. The cubic root of 668724468 is about 874.4783690372.

The spelling of 668724468 in words is "six hundred sixty-eight million, seven hundred twenty-four thousand, four hundred sixty-eight".