66259776977 has 8 divisors (see below), whose sum is σ = 70248914400. Its totient is φ = 62320817664.

The previous prime is 66259776949. The next prime is 66259777007. The reversal of 66259776977 is 77967795266.

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

It is a cyclic number.

It is not a de Polignac number, because 66259776977 - 2⁸ = 66259776721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66259776977.

It is not an unprimeable number, because it can be changed into a prime (66259776577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12541808 + ... + 12547089.

It is an arithmetic number, because the mean of its divisors is an integer number (8781114300).

Almost surely, 2^66259776977 is an apocalyptic number.

It is an amenable number.

66259776977 is a deficient number, since it is larger than the sum of its proper divisors (3989137423).

66259776977 is a wasteful number, since it uses less digits than its factorization.

66259776977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25089055.

The product of its digits is 420078960, while the sum is 71.

The spelling of 66259776977 in words is "sixty-six billion, two hundred fifty-nine million, seven hundred seventy-six thousand, nine hundred seventy-seven".