66399064377 has 8 divisors (see below), whose sum is σ = 88736549664. Its totient is φ = 44163811008.

The previous prime is 66399064373. The next prime is 66399064409. The reversal of 66399064377 is 77346099366.

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

It is not a de Polignac number, because 66399064377 - 2² = 66399064373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66399064377.

It is not an unprimeable number, because it can be changed into a prime (66399064373) 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, 25556463 + ... + 25559060.

It is an arithmetic number, because the mean of its divisors is an integer number (11092068708).

Almost surely, 2^66399064377 is an apocalyptic number.

It is an amenable number.

66399064377 is a deficient number, since it is larger than the sum of its proper divisors (22337485287).

66399064377 is a wasteful number, since it uses less digits than its factorization.

66399064377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51115959.

The product of its (nonzero) digits is 30862944, while the sum is 60.

The spelling of 66399064377 in words is "sixty-six billion, three hundred ninety-nine million, sixty-four thousand, three hundred seventy-seven".