66868599131 has 8 divisors (see below), whose sum is σ = 70817362944. Its totient is φ = 63006621480.

The previous prime is 66868599121. The next prime is 66868599137. The reversal of 66868599131 is 13199586866.

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

It is a cyclic number.

It is not a de Polignac number, because 66868599131 - 2⁶ = 66868599067 is a prime.

It is a super-2 number, since 2×66868599131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66868599137) 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, 21694955 + ... + 21698036.

It is an arithmetic number, because the mean of its divisors is an integer number (8852170368).

Almost surely, 2^66868599131 is an apocalyptic number.

66868599131 is a deficient number, since it is larger than the sum of its proper divisors (3948763813).

66868599131 is a wasteful number, since it uses less digits than its factorization.

66868599131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43393081.

The product of its digits is 16796160, while the sum is 62.

The spelling of 66868599131 in words is "sixty-six billion, eight hundred sixty-eight million, five hundred ninety-nine thousand, one hundred thirty-one".