66681339962 has 16 divisors (see below), whose sum is σ = 104588720640. Its totient is φ = 31824486672.

The previous prime is 66681339961. The next prime is 66681340021. The reversal of 66681339962 is 26993318666.

It is a super-2 number, since 2×66681339962² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66681339961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491113 + ... + 1535180.

It is an arithmetic number, because the mean of its divisors is an integer number (6536795040).

Almost surely, 2^66681339962 is an apocalyptic number.

66681339962 is a deficient number, since it is larger than the sum of its proper divisors (37907380678).

66681339962 is a wasteful number, since it uses less digits than its factorization.

66681339962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026797.

The product of its digits is 15116544, while the sum is 59.

The spelling of 66681339962 in words is "sixty-six billion, six hundred eighty-one million, three hundred thirty-nine thousand, nine hundred sixty-two".