668400673367 has 4 divisors (see below), whose sum is σ = 763886483856. Its totient is φ = 572914862880.

The previous prime is 668400673313. The next prime is 668400673387. The reversal of 668400673367 is 763376004866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668400673367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668400673387) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 47742905234 + ... + 47742905247.

It is an arithmetic number, because the mean of its divisors is an integer number (190971620964).

Almost surely, 2^668400673367 is an apocalyptic number.

668400673367 is a deficient number, since it is larger than the sum of its proper divisors (95485810489).

668400673367 is an equidigital number, since it uses as much as digits as its factorization.

668400673367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95485810488.

The product of its (nonzero) digits is 18289152, while the sum is 56.

The spelling of 668400673367 in words is "six hundred sixty-eight billion, four hundred million, six hundred seventy-three thousand, three hundred sixty-seven".