66822599544 has 32 divisors (see below), whose sum is σ = 169549883520. Its totient is φ = 21941748576.

The previous prime is 66822599531. The next prime is 66822599581. The reversal of 66822599544 is 44599522866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20776564 + ... + 20779779.

It is an arithmetic number, because the mean of its divisors is an integer number (5298433860).

Almost surely, 2^66822599544 is an apocalyptic number.

It is an amenable number.

66822599544 is an abundant number, since it is smaller than the sum of its proper divisors (102727283976).

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

66822599544 is a wasteful number, since it uses less digits than its factorization.

66822599544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41556419 (or 41556415 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 60.

The spelling of 66822599544 in words is "sixty-six billion, eight hundred twenty-two million, five hundred ninety-nine thousand, five hundred forty-four".