668135369559 has 8 divisors (see below), whose sum is σ = 1018111039360. Its totient is φ = 381791639736.

The previous prime is 668135369533. The next prime is 668135369591. The reversal of 668135369559 is 955963531866.

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

It is not a de Polignac number, because 668135369559 - 2⁵ = 668135369527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668135369559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668135369599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15907984969 + ... + 15907985010.

It is an arithmetic number, because the mean of its divisors is an integer number (127263879920).

Almost surely, 2^668135369559 is an apocalyptic number.

668135369559 is a deficient number, since it is larger than the sum of its proper divisors (349975669801).

668135369559 is a wasteful number, since it uses less digits than its factorization.

668135369559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31815969989.

The product of its digits is 157464000, while the sum is 66.

The spelling of 668135369559 in words is "six hundred sixty-eight billion, one hundred thirty-five million, three hundred sixty-nine thousand, five hundred fifty-nine".