68666311563 has 8 divisors (see below), whose sum is σ = 94712154000. Its totient is φ = 44199005088.

The previous prime is 68666311513. The next prime is 68666311573. The reversal of 68666311563 is 36511366686.

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

It is not a de Polignac number, because 68666311563 - 2¹⁷ = 68666180491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68666311513) 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, 394633888 + ... + 394634061.

It is an arithmetic number, because the mean of its divisors is an integer number (11839019250).

Almost surely, 2^68666311563 is an apocalyptic number.

68666311563 is a deficient number, since it is larger than the sum of its proper divisors (26045842437).

68666311563 is a wasteful number, since it uses less digits than its factorization.

68666311563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789267981.

The product of its digits is 2799360, while the sum is 51.

The spelling of 68666311563 in words is "sixty-eight billion, six hundred sixty-six million, three hundred eleven thousand, five hundred sixty-three".