66879798136593 has 64 divisors (see below), whose sum is σ = 97160039488512. Its totient is φ = 40676482679040.

The previous prime is 66879798136561. The next prime is 66879798136651. The reversal of 66879798136593 is 39563189797866.

It is not a de Polignac number, because 66879798136593 - 2⁵ = 66879798136561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66879798136553) 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, 1247800471 + ... + 1247854067.

It is an arithmetic number, because the mean of its divisors is an integer number (1518125617008).

Almost surely, 2^{66879798136593} is an apocalyptic number.

It is an amenable number.

66879798136593 is a deficient number, since it is larger than the sum of its proper divisors (30280241351919).

66879798136593 is a wasteful number, since it uses less digits than its factorization.

66879798136593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54734.

The product of its digits is 22221319680, while the sum is 87.

The spelling of 66879798136593 in words is "sixty-six trillion, eight hundred seventy-nine billion, seven hundred ninety-eight million, one hundred thirty-six thousand, five hundred ninety-three".