668277807542 has 16 divisors (see below), whose sum is σ = 1029541423680. Its totient is φ = 325097900928.

The previous prime is 668277807503. The next prime is 668277807551. The reversal of 668277807542 is 245708772866.

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, 2577059 + ... + 2824497.

It is an arithmetic number, because the mean of its divisors is an integer number (64346338980).

Almost surely, 2^668277807542 is an apocalyptic number.

668277807542 is a deficient number, since it is larger than the sum of its proper divisors (361263616138).

668277807542 is a wasteful number, since it uses less digits than its factorization.

668277807542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283975.

The product of its (nonzero) digits is 63221760, while the sum is 62.

The spelling of 668277807542 in words is "six hundred sixty-eight billion, two hundred seventy-seven million, eight hundred seven thousand, five hundred forty-two".