668032438766 has 48 divisors (see below), whose sum is σ = 1313501156352. Its totient is φ = 248956173840.

The previous prime is 668032438757. The next prime is 668032438771. The reversal of 668032438766 is 667834230866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8533910 + ... + 8611833.

It is an arithmetic number, because the mean of its divisors is an integer number (27364607424).

Almost surely, 2^668032438766 is an apocalyptic number.

668032438766 is a deficient number, since it is larger than the sum of its proper divisors (645468717586).

668032438766 is a wasteful number, since it uses less digits than its factorization.

668032438766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17145797 (or 17145786 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 59.

The spelling of 668032438766 in words is "six hundred sixty-eight billion, thirty-two million, four hundred thirty-eight thousand, seven hundred sixty-six".