66759699870875 has 64 divisors (see below), whose sum is σ = 96354031572864. Its totient is φ = 45640806400000.

The previous prime is 66759699870863. The next prime is 66759699870907. The reversal of 66759699870875 is 57807899695766.

It is not a de Polignac number, because 66759699870875 - 2¹⁰ = 66759699869851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17451515 + ... + 20930235.

It is an arithmetic number, because the mean of its divisors is an integer number (1505531743326).

Almost surely, 2^{66759699870875} is an apocalyptic number.

66759699870875 is a deficient number, since it is larger than the sum of its proper divisors (29594331701989).

66759699870875 is a wasteful number, since it uses less digits than its factorization.

66759699870875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479585 (or 3479575 counting only the distinct ones).

The product of its (nonzero) digits is 86416243200, while the sum is 92.

The spelling of 66759699870875 in words is "sixty-six trillion, seven hundred fifty-nine billion, six hundred ninety-nine million, eight hundred seventy thousand, eight hundred seventy-five".