66779873330 has 64 divisors (see below), whose sum is σ = 125466599808. Its totient is φ = 25568524800.

The previous prime is 66779873323. The next prime is 66779873339. The reversal of 66779873330 is 3337897766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66779873330.

It is not an unprimeable number, because it can be changed into a prime (66779873339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37078430 + ... + 37080230.

It is an arithmetic number, because the mean of its divisors is an integer number (1960415622).

Almost surely, 2^66779873330 is an apocalyptic number.

66779873330 is a deficient number, since it is larger than the sum of its proper divisors (58686726478).

66779873330 is a wasteful number, since it uses less digits than its factorization.

66779873330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531.

The product of its (nonzero) digits is 24004512, while the sum is 59.

The spelling of 66779873330 in words is "sixty-six billion, seven hundred seventy-nine million, eight hundred seventy-three thousand, three hundred thirty".