66122507768 has 16 divisors (see below), whose sum is σ = 125076869280. Its totient is φ = 32768675968.

The previous prime is 66122507741. The next prime is 66122507779. The reversal of 66122507768 is 86770522166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36571280 + ... + 36573087.

It is an arithmetic number, because the mean of its divisors is an integer number (7817304330).

Almost surely, 2^66122507768 is an apocalyptic number.

It is an amenable number.

66122507768 is a deficient number, since it is larger than the sum of its proper divisors (58954361512).

66122507768 is a wasteful number, since it uses less digits than its factorization.

66122507768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73144486 (or 73144482 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 66122507768 in words is "sixty-six billion, one hundred twenty-two million, five hundred seven thousand, seven hundred sixty-eight".