66775817362604 has 24 divisors (see below), whose sum is σ = 133552572683040. Its totient is φ = 28618006450176.

The previous prime is 66775817362571. The next prime is 66775817362621. The reversal of 66775817362604 is 40626371857766.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4281539 + ... + 12324090.

It is an arithmetic number, because the mean of its divisors is an integer number (5564690528460).

Almost surely, 2^{66775817362604} is an apocalyptic number.

It is an amenable number.

66775817362604 is an abundant number, since it is smaller than the sum of its proper divisors (66776755320436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66775817362604 is a wasteful number, since it uses less digits than its factorization.

66775817362604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16749257 (or 16749255 counting only the distinct ones).

The product of its (nonzero) digits is 426746880, while the sum is 68.

The spelling of 66775817362604 in words is "sixty-six trillion, seven hundred seventy-five billion, eight hundred seventeen million, three hundred sixty-two thousand, six hundred four".