668331290 has 16 divisors (see below), whose sum is σ = 1312359840. Its totient is φ = 243029520.

The previous prime is 668331269. The next prime is 668331359. The reversal of 668331290 is 92133866.

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, 3037760 + ... + 3037979.

It is an arithmetic number, because the mean of its divisors is an integer number (82022490).

Almost surely, 2^668331290 is an apocalyptic number.

668331290 is a deficient number, since it is larger than the sum of its proper divisors (644028550).

668331290 is a wasteful number, since it uses less digits than its factorization.

668331290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6075757.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 668331290 is about 25852.1041696803. The cubic root of 668331290 is about 874.3069516205.

It can be divided in two parts, 6683 and 31290, that added together give a palindrome (37973).

The spelling of 668331290 in words is "six hundred sixty-eight million, three hundred thirty-one thousand, two hundred ninety".