66959129 has 2 divisors, whose sum is σ = 66959130. Its totient is φ = 66959128.

The previous prime is 66959117. The next prime is 66959147. The reversal of 66959129 is 92195966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 27583504 = 6275^2 + 5252^2 .

It is a cyclic number.

It is not a de Polignac number, because 66959129 - 2⁸ = 66958873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66959329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33479564 + 33479565.

It is an arithmetic number, because the mean of its divisors is an integer number (33479565).

Almost surely, 2^66959129 is an apocalyptic number.

It is an amenable number.

66959129 is a deficient number, since it is larger than the sum of its proper divisors (1).

66959129 is an equidigital number, since it uses as much as digits as its factorization.

66959129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 47.

The square root of 66959129 is about 8182.8557973363. The cubic root of 66959129 is about 406.0722064138.

The spelling of 66959129 in words is "sixty-six million, nine hundred fifty-nine thousand, one hundred twenty-nine".