66328690077 has 80 divisors (see below), whose sum is σ = 107705929408. Its totient is φ = 40436755200.

The previous prime is 66328690069. The next prime is 66328690079. The reversal of 66328690077 is 77009682366.

It is not a de Polignac number, because 66328690077 - 2³ = 66328690069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328690079) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 103154718 + ... + 103155360.

Almost surely, 2^66328690077 is an apocalyptic number.

It is an amenable number.

66328690077 is a deficient number, since it is larger than the sum of its proper divisors (41377239331).

66328690077 is a wasteful number, since it uses less digits than its factorization.

66328690077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 66328690077 in words is "sixty-six billion, three hundred twenty-eight million, six hundred ninety thousand, seventy-seven".