66125756628216 has 24 divisors (see below), whose sum is σ = 179090590868280. Its totient is φ = 22041918876048.

The previous prime is 66125756628091. The next prime is 66125756628223. The reversal of 66125756628216 is 61282665752166.

66125756628216 is a `hidden beast` number, since 6 + 6 + 1 + 2 + 57 + 566 + 2 + 8 + 2 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459206643180 + ... + 459206643323.

It is an arithmetic number, because the mean of its divisors is an integer number (7462107952845).

Almost surely, 2^{66125756628216} is an apocalyptic number.

It is an amenable number.

66125756628216 is an abundant number, since it is smaller than the sum of its proper divisors (112964834240064).

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

66125756628216 is a wasteful number, since it uses less digits than its factorization.

66125756628216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918413286515 (or 918413286508 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 66125756628216 in words is "sixty-six trillion, one hundred twenty-five billion, seven hundred fifty-six million, six hundred twenty-eight thousand, two hundred sixteen".