66965237 has 2 divisors, whose sum is σ = 66965238. Its totient is φ = 66965236.

The previous prime is 66965231. The next prime is 66965243. The reversal of 66965237 is 73256966.

It is a balanced prime because it is at equal distance from previous prime (66965231) and next prime (66965243).

It can be written as a sum of positive squares in only one way, i.e., 57668836 + 9296401 = 7594^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 66965237 - 2⁴ = 66965221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66965231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33482618 + 33482619.

It is an arithmetic number, because the mean of its divisors is an integer number (33482619).

Almost surely, 2^66965237 is an apocalyptic number.

It is an amenable number.

66965237 is a deficient number, since it is larger than the sum of its proper divisors (1).

66965237 is an equidigital number, since it uses as much as digits as its factorization.

66965237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 44.

The square root of 66965237 is about 8183.2290081605. The cubic root of 66965237 is about 406.0845533168.

The spelling of 66965237 in words is "sixty-six million, nine hundred sixty-five thousand, two hundred thirty-seven".