668782982 has 16 divisors (see below), whose sum is σ = 1148204832. Its totient is φ = 286191360.

The previous prime is 668782979. The next prime is 668782987. The reversal of 668782982 is 289287866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668782987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26069 + ... + 44912.

It is an arithmetic number, because the mean of its divisors is an integer number (71762802).

Almost surely, 2^668782982 is an apocalyptic number.

668782982 is a deficient number, since it is larger than the sum of its proper divisors (479421850).

668782982 is a wasteful number, since it uses less digits than its factorization.

668782982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71663.

The product of its digits is 4644864, while the sum is 56.

The square root of 668782982 is about 25860.8387721667. The cubic root of 668782982 is about 874.5038741779.

The spelling of 668782982 in words is "six hundred sixty-eight million, seven hundred eighty-two thousand, nine hundred eighty-two".