64865670073 has 2 divisors, whose sum is σ = 64865670074. Its totient is φ = 64865670072.

The previous prime is 64865670053. The next prime is 64865670269. The reversal of 64865670073 is 37007656846.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59011583929 + 5854086144 = 242923^2 + 76512^2 .

It is a cyclic number.

It is not a de Polignac number, because 64865670073 - 2⁵ = 64865670041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64865670073.

It is not a weakly prime, because it can be changed into another prime (64865670053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32432835036 + 32432835037.

It is an arithmetic number, because the mean of its divisors is an integer number (32432835037).

Almost surely, 2^64865670073 is an apocalyptic number.

It is an amenable number.

64865670073 is a deficient number, since it is larger than the sum of its proper divisors (1).

64865670073 is an equidigital number, since it uses as much as digits as its factorization.

64865670073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 64865670073 in words is "sixty-four billion, eight hundred sixty-five million, six hundred seventy thousand, seventy-three".