66317871366 has 16 divisors (see below), whose sum is σ = 147373047600. Its totient is φ = 22105957104.

The previous prime is 66317871349. The next prime is 66317871407.

It is a happy number.

66317871366 is nontrivially palindromic in base 10.

66317871366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1228108729 = 66317871366 / (6 + 6 + 3 + 1 + 7 + 8 + 7 + 1 + 3 + 6 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614054311 + ... + 614054418.

It is an arithmetic number, because the mean of its divisors is an integer number (9210815475).

Almost surely, 2^66317871366 is an apocalyptic number.

66317871366 is an abundant number, since it is smaller than the sum of its proper divisors (81055176234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66317871366 is a wasteful number, since it uses less digits than its factorization.

66317871366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228108740 (or 1228108734 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 66317871366 in words is "sixty-six billion, three hundred seventeen million, eight hundred seventy-one thousand, three hundred sixty-six".