668277681382 has 16 divisors (see below), whose sum is σ = 1065610827792. Its totient is φ = 313230688000.

The previous prime is 668277681371. The next prime is 668277681397. The reversal of 668277681382 is 283186772866.

668277681382 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 39145303 + ... + 39162370.

It is an arithmetic number, because the mean of its divisors is an integer number (66600676737).

Almost surely, 2^668277681382 is an apocalyptic number.

668277681382 is a deficient number, since it is larger than the sum of its proper divisors (397333146410).

668277681382 is a wasteful number, since it uses less digits than its factorization.

668277681382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78307943.

The product of its digits is 65028096, while the sum is 64.

The spelling of 668277681382 in words is "six hundred sixty-eight billion, two hundred seventy-seven million, six hundred eighty-one thousand, three hundred eighty-two".