66125608231 has 2 divisors, whose sum is σ = 66125608232. Its totient is φ = 66125608230.

The previous prime is 66125608217. The next prime is 66125608267. The reversal of 66125608231 is 13280652166.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66125608231 is a prime.

It is a super-2 number, since 2×66125608231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66125608831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33062804115 + 33062804116.

It is an arithmetic number, because the mean of its divisors is an integer number (33062804116).

Almost surely, 2^66125608231 is an apocalyptic number.

66125608231 is a deficient number, since it is larger than the sum of its proper divisors (1).

66125608231 is an equidigital number, since it uses as much as digits as its factorization.

66125608231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 66125608231 in words is "sixty-six billion, one hundred twenty-five million, six hundred eight thousand, two hundred thirty-one".