66977313772 has 12 divisors (see below), whose sum is σ = 119196914760. Its totient is φ = 32921052416.

The previous prime is 66977313769. The next prime is 66977313773. The reversal of 66977313772 is 27731377966.

It is a super-2 number, since 2×66977313772² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66977313773) 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 3 ways as a sum of consecutive naturals, for example, 141900853 + ... + 141901324.

It is an arithmetic number, because the mean of its divisors is an integer number (9933076230).

Almost surely, 2^66977313772 is an apocalyptic number.

It is an amenable number.

66977313772 is a deficient number, since it is larger than the sum of its proper divisors (52219600988).

66977313772 is a wasteful number, since it uses less digits than its factorization.

66977313772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283802240 (or 283802238 counting only the distinct ones).

The product of its digits is 14002632, while the sum is 58.

The spelling of 66977313772 in words is "sixty-six billion, nine hundred seventy-seven million, three hundred thirteen thousand, seven hundred seventy-two".