668793574 has 8 divisors (see below), whose sum is σ = 1030303728. Its totient is φ = 325359000.

The previous prime is 668793571. The next prime is 668793581. The reversal of 668793574 is 475397866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668793571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4518802 + ... + 4518949.

It is an arithmetic number, because the mean of its divisors is an integer number (128787966).

Almost surely, 2^668793574 is an apocalyptic number.

668793574 is a deficient number, since it is larger than the sum of its proper divisors (361510154).

668793574 is a wasteful number, since it uses less digits than its factorization.

668793574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9037790.

The product of its digits is 7620480, while the sum is 55.

The square root of 668793574 is about 25861.0435597638. The cubic root of 668793574 is about 874.5084908704.

The spelling of 668793574 in words is "six hundred sixty-eight million, seven hundred ninety-three thousand, five hundred seventy-four".