66779873230 has 64 divisors (see below), whose sum is σ = 144667192320. Its totient is φ = 21681734400.

The previous prime is 66779873207. The next prime is 66779873239. The reversal of 66779873230 is 3237897766.

It is a happy number.

It is a super-2 number, since 2×66779873230² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66779873239) 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, 3596370 + ... + 3614890.

It is an arithmetic number, because the mean of its divisors is an integer number (2260424880).

Almost surely, 2^66779873230 is an apocalyptic number.

66779873230 is an abundant number, since it is smaller than the sum of its proper divisors (77887319090).

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

66779873230 is a wasteful number, since it uses less digits than its factorization.

66779873230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21265.

The product of its (nonzero) digits is 16003008, while the sum is 58.

The spelling of 66779873230 in words is "sixty-six billion, seven hundred seventy-nine million, eight hundred seventy-three thousand, two hundred thirty".