66776700777 has 8 divisors (see below), whose sum is σ = 89042697216. Its totient is φ = 44514252432.

The previous prime is 66776700713. The next prime is 66776700799. The reversal of 66776700777 is 77700767766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66776700777 - 2⁶ = 66776700713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66776700777.

It is not an unprimeable number, because it can be changed into a prime (66776700707) 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, 842793 + ... + 918614.

It is an arithmetic number, because the mean of its divisors is an integer number (11130337152).

Almost surely, 2^66776700777 is an apocalyptic number.

It is an amenable number.

66776700777 is a deficient number, since it is larger than the sum of its proper divisors (22265996439).

66776700777 is a wasteful number, since it uses less digits than its factorization.

66776700777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774047.

The product of its (nonzero) digits is 25412184, while the sum is 60.

The spelling of 66776700777 in words is "sixty-six billion, seven hundred seventy-six million, seven hundred thousand, seven hundred seventy-seven".