66125707 has 2 divisors, whose sum is σ = 66125708. Its totient is φ = 66125706.

The previous prime is 66125687. The next prime is 66125749. The reversal of 66125707 is 70752166.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66125707 is a prime.

It is not a weakly prime, because it can be changed into another prime (66125777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33062853 + 33062854.

It is an arithmetic number, because the mean of its divisors is an integer number (33062854).

Almost surely, 2^66125707 is an apocalyptic number.

66125707 is a deficient number, since it is larger than the sum of its proper divisors (1).

66125707 is an equidigital number, since it uses as much as digits as its factorization.

66125707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 66125707 is about 8131.7714552243. The cubic root of 66125707 is about 404.3804111387.

The spelling of 66125707 in words is "sixty-six million, one hundred twenty-five thousand, seven hundred seven".