66064249 has 2 divisors, whose sum is σ = 66064250. Its totient is φ = 66064248.

The previous prime is 66064241. The next prime is 66064279. The reversal of 66064249 is 94246066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63282025 + 2782224 = 7955^2 + 1668^2 .

It is a cyclic number.

It is not a de Polignac number, because 66064249 - 2³ = 66064241 is a prime.

It is not a weakly prime, because it can be changed into another prime (66064241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33032124 + 33032125.

It is an arithmetic number, because the mean of its divisors is an integer number (33032125).

Almost surely, 2^66064249 is an apocalyptic number.

It is an amenable number.

66064249 is a deficient number, since it is larger than the sum of its proper divisors (1).

66064249 is an equidigital number, since it uses as much as digits as its factorization.

66064249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 66064249 is about 8127.9916953698. The cubic root of 66064249 is about 404.2550936901.

The spelling of 66064249 in words is "sixty-six million, sixty-four thousand, two hundred forty-nine".