665070571213 has 2 divisors, whose sum is σ = 665070571214. Its totient is φ = 665070571212.

The previous prime is 665070571169. The next prime is 665070571309. The reversal of 665070571213 is 312175070566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515210999524 + 149859571689 = 717782^2 + 387117^2 .

It is a cyclic number.

It is not a de Polignac number, because 665070571213 - 2²¹ = 665068474061 is a prime.

It is a super-2 number, since 2×665070571213² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665070571213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665070571513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332535285606 + 332535285607.

It is an arithmetic number, because the mean of its divisors is an integer number (332535285607).

Almost surely, 2^665070571213 is an apocalyptic number.

It is an amenable number.

665070571213 is a deficient number, since it is larger than the sum of its proper divisors (1).

665070571213 is an equidigital number, since it uses as much as digits as its factorization.

665070571213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 665070571213 in words is "six hundred sixty-five billion, seventy million, five hundred seventy-one thousand, two hundred thirteen".