665449022629 has 2 divisors, whose sum is σ = 665449022630. Its totient is φ = 665449022628.

The previous prime is 665449022569. The next prime is 665449022657. The reversal of 665449022629 is 926220944566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364900564900 + 300548457729 = 604070^2 + 548223^2 .

It is a cyclic number.

It is not a de Polignac number, because 665449022629 - 2³⁷ = 528010069157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665449022629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665449022129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332724511314 + 332724511315.

It is an arithmetic number, because the mean of its divisors is an integer number (332724511315).

Almost surely, 2^665449022629 is an apocalyptic number.

It is an amenable number.

665449022629 is a deficient number, since it is larger than the sum of its proper divisors (1).

665449022629 is an equidigital number, since it uses as much as digits as its factorization.

665449022629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 665449022629 in words is "six hundred sixty-five billion, four hundred forty-nine million, twenty-two thousand, six hundred twenty-nine".