64666337 has 2 divisors, whose sum is σ = 64666338. Its totient is φ = 64666336.

The previous prime is 64666331. The next prime is 64666369. The reversal of 64666337 is 73366646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50708641 + 13957696 = 7121^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 64666337 - 2⁸ = 64666081 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64666294 and 64666303.

It is not a weakly prime, because it can be changed into another prime (64666331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32333168 + 32333169.

It is an arithmetic number, because the mean of its divisors is an integer number (32333169).

Almost surely, 2^64666337 is an apocalyptic number.

It is an amenable number.

64666337 is a deficient number, since it is larger than the sum of its proper divisors (1).

64666337 is an equidigital number, since it uses as much as digits as its factorization.

64666337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 41.

The square root of 64666337 is about 8041.5382234993. The cubic root of 64666337 is about 401.3834119956.

The spelling of 64666337 in words is "sixty-four million, six hundred sixty-six thousand, three hundred thirty-seven".