66883977568 has 12 divisors (see below), whose sum is σ = 131677830900. Its totient is φ = 33441988768.

The previous prime is 66883977547. The next prime is 66883977569. The reversal of 66883977568 is 86577938866.

It is a self number, because there is not a number n which added to its sum of digits gives 66883977568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883977569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045062118 + ... + 1045062181.

It is an arithmetic number, because the mean of its divisors is an integer number (10973152575).

Almost surely, 2^66883977568 is an apocalyptic number.

It is an amenable number.

66883977568 is a deficient number, since it is larger than the sum of its proper divisors (64793853332).

66883977568 is a wasteful number, since it uses less digits than its factorization.

66883977568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090124309 (or 2090124301 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 73.

The spelling of 66883977568 in words is "sixty-six billion, eight hundred eighty-three million, nine hundred seventy-seven thousand, five hundred sixty-eight".