66664302356 has 24 divisors (see below), whose sum is σ = 118332587520. Its totient is φ = 32855205600.

The previous prime is 66664302319. The next prime is 66664302449. The reversal of 66664302356 is 65320346666.

It is a super-2 number, since 2×66664302356² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66664302356.

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, 1347710 + ... + 1396298.

It is an arithmetic number, because the mean of its divisors is an integer number (4930524480).

Almost surely, 2^66664302356 is an apocalyptic number.

It is an amenable number.

66664302356 is a deficient number, since it is larger than the sum of its proper divisors (51668285164).

66664302356 is a wasteful number, since it uses less digits than its factorization.

66664302356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53495 (or 53493 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 47.

The spelling of 66664302356 in words is "sixty-six billion, six hundred sixty-four million, three hundred two thousand, three hundred fifty-six".