66859653120001 has 64 divisors (see below), whose sum is σ = 84259489054720. Its totient is φ = 51765787514880.

The previous prime is 66859653119983. The next prime is 66859653120017. The reversal of 66859653120001 is 10002135695866.

It is a cyclic number.

It is not a de Polignac number, because 66859653120001 - 2⁷ = 66859653119873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66859653120101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 88809775 + ... + 89559451.

It is an arithmetic number, because the mean of its divisors is an integer number (1316554516480).

Almost surely, 2^{66859653120001} is an apocalyptic number.

It is an amenable number.

66859653120001 is a deficient number, since it is larger than the sum of its proper divisors (17399835934719).

66859653120001 is a wasteful number, since it uses less digits than its factorization.

66859653120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750054.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 66859653120001 in words is "sixty-six trillion, eight hundred fifty-nine billion, six hundred fifty-three million, one hundred twenty thousand, one".