668767319 has 8 divisors (see below), whose sum is σ = 730613520. Its totient is φ = 607096000.

The previous prime is 668767291. The next prime is 668767367. The reversal of 668767319 is 913767866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668767319 is a prime.

It is a super-2 number, since 2×668767319² = 894499453924895522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668767219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35654 + ... + 51075.

It is an arithmetic number, because the mean of its divisors is an integer number (91326690).

Almost surely, 2^668767319 is an apocalyptic number.

668767319 is a deficient number, since it is larger than the sum of its proper divisors (61846201).

668767319 is a wasteful number, since it uses less digits than its factorization.

668767319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87441.

The product of its digits is 2286144, while the sum is 53.

The square root of 668767319 is about 25860.5359379886. The cubic root of 668767319 is about 874.4970471197.

The spelling of 668767319 in words is "six hundred sixty-eight million, seven hundred sixty-seven thousand, three hundred nineteen".