66686999313 has 8 divisors (see below), whose sum is σ = 96999271776. Its totient is φ = 40416363200.

The previous prime is 66686999299. The next prime is 66686999359. The reversal of 66686999313 is 31399968666.

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 66686999313 - 2¹⁰ = 66686998289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66686994313) 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, 1010409048 + ... + 1010409113.

It is an arithmetic number, because the mean of its divisors is an integer number (12124908972).

Almost surely, 2^66686999313 is an apocalyptic number.

It is an amenable number.

66686999313 is a deficient number, since it is larger than the sum of its proper divisors (30312272463).

66686999313 is a wasteful number, since it uses less digits than its factorization.

66686999313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020818175.

The product of its digits is 68024448, while the sum is 66.

The spelling of 66686999313 in words is "sixty-six billion, six hundred eighty-six million, nine hundred ninety-nine thousand, three hundred thirteen".