66762076066656 has 48 divisors (see below), whose sum is σ = 177468809817600. Its totient is φ = 21972328829568.

The previous prime is 66762076066633. The next prime is 66762076066661. The reversal of 66762076066656 is 65666067026766.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4401500596 + ... + 4401515763.

It is an arithmetic number, because the mean of its divisors is an integer number (3697266871200).

Almost surely, 2^{66762076066656} is an apocalyptic number.

It is an amenable number.

66762076066656 is an abundant number, since it is smaller than the sum of its proper divisors (110706733750944).

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

66762076066656 is a wasteful number, since it uses less digits than its factorization.

66762076066656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8803016451 (or 8803016443 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 69.

The spelling of 66762076066656 in words is "sixty-six trillion, seven hundred sixty-two billion, seventy-six million, sixty-six thousand, six hundred fifty-six".