66719235323 has 32 divisors (see below), whose sum is σ = 75718238400. Its totient is φ = 58355490816.

The previous prime is 66719235313. The next prime is 66719235329. The reversal of 66719235323 is 32353291766.

It is a happy number.

It is not a de Polignac number, because 66719235323 - 2¹⁰ = 66719234299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66719235329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14967311 + ... + 14971767.

It is an arithmetic number, because the mean of its divisors is an integer number (2366194950).

Almost surely, 2^66719235323 is an apocalyptic number.

66719235323 is a deficient number, since it is larger than the sum of its proper divisors (8999003077).

66719235323 is a wasteful number, since it uses less digits than its factorization.

66719235323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231.

The product of its digits is 1224720, while the sum is 47.

The spelling of 66719235323 in words is "sixty-six billion, seven hundred nineteen million, two hundred thirty-five thousand, three hundred twenty-three".