66671879900 has 36 divisors (see below), whose sum is σ = 148588203288. Its totient is φ = 25947973440.

The previous prime is 66671879891. The next prime is 66671879903. The reversal of 66671879900 is 997817666.

It is a self number, because there is not a number n which added to its sum of digits gives 66671879900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66671879903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9006014 + ... + 9013413.

Almost surely, 2^66671879900 is an apocalyptic number.

It is an amenable number.

66671879900 is an abundant number, since it is smaller than the sum of its proper divisors (81916323388).

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

66671879900 is a wasteful number, since it uses less digits than its factorization.

66671879900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18019478 (or 18019471 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 66671879900 in words is "sixty-six billion, six hundred seventy-one million, eight hundred seventy-nine thousand, nine hundred".