66456699323 has 16 divisors (see below), whose sum is σ = 79970795520. Its totient is φ = 53949390336.

The previous prime is 66456699313. The next prime is 66456699341. The reversal of 66456699323 is 32399665466.

It is a cyclic number.

It is not a de Polignac number, because 66456699323 - 2²² = 66452505019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66456699313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406811 + ... + 546267.

It is an arithmetic number, because the mean of its divisors is an integer number (4998174720).

Almost surely, 2^66456699323 is an apocalyptic number.

66456699323 is a deficient number, since it is larger than the sum of its proper divisors (13514096197).

66456699323 is a wasteful number, since it uses less digits than its factorization.

66456699323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143066.

The product of its digits is 37791360, while the sum is 59.

The spelling of 66456699323 in words is "sixty-six billion, four hundred fifty-six million, six hundred ninety-nine thousand, three hundred twenty-three".