668277853806 has 16 divisors (see below), whose sum is σ = 1337342400000. Its totient is φ = 222628169208.

The previous prime is 668277853759. The next prime is 668277853823. The reversal of 668277853806 is 608358772866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32767806 + ... + 32788193.

It is an arithmetic number, because the mean of its divisors is an integer number (83583900000).

Almost surely, 2^668277853806 is an apocalyptic number.

668277853806 is an abundant number, since it is smaller than the sum of its proper divisors (669064546194).

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

668277853806 is a wasteful number, since it uses less digits than its factorization.

668277853806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65557703.

The product of its (nonzero) digits is 162570240, while the sum is 66.

The spelling of 668277853806 in words is "six hundred sixty-eight billion, two hundred seventy-seven million, eight hundred fifty-three thousand, eight hundred six".