66575064377 has 4 divisors (see below), whose sum is σ = 66575639040. Its totient is φ = 66574489716.

The previous prime is 66575064343. The next prime is 66575064389. The reversal of 66575064377 is 77346057566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66575064377 - 2²⁰ = 66574015801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66575064397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45977 + ... + 367782.

It is an arithmetic number, because the mean of its divisors is an integer number (16643909760).

Almost surely, 2^66575064377 is an apocalyptic number.

It is an amenable number.

66575064377 is a deficient number, since it is larger than the sum of its proper divisors (574663).

66575064377 is a wasteful number, since it uses less digits than its factorization.

66575064377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574662.

The product of its (nonzero) digits is 22226400, while the sum is 56.

The spelling of 66575064377 in words is "sixty-six billion, five hundred seventy-five million, sixty-four thousand, three hundred seventy-seven".