66761777707676 has 24 divisors (see below), whose sum is σ = 118027179876144. Its totient is φ = 33039935308800.

The previous prime is 66761777707663. The next prime is 66761777707687. The reversal of 66761777707676 is 67670777716766.

It is a self number, because there is not a number n which added to its sum of digits gives 66761777707676.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24844805 + ... + 27400508.

It is an arithmetic number, because the mean of its divisors is an integer number (4917799161506).

Almost surely, 2^{66761777707676} is an apocalyptic number.

It is an amenable number.

66761777707676 is a deficient number, since it is larger than the sum of its proper divisors (51265402168468).

66761777707676 is a wasteful number, since it uses less digits than its factorization.

66761777707676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52248581 (or 52248579 counting only the distinct ones).

The product of its (nonzero) digits is 6403870368, while the sum is 80.

The spelling of 66761777707676 in words is "sixty-six trillion, seven hundred sixty-one billion, seven hundred seventy-seven million, seven hundred seven thousand, six hundred seventy-six".