665470028117 has 2 divisors, whose sum is σ = 665470028118. Its totient is φ = 665470028116.

The previous prime is 665470028011. The next prime is 665470028123. The reversal of 665470028117 is 711820074566.

665470028117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506774558161 + 158695469956 = 711881^2 + 398366^2 .

It is a cyclic number.

It is not a de Polignac number, because 665470028117 - 2²⁶ = 665402919253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665470028417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332735014058 + 332735014059.

It is an arithmetic number, because the mean of its divisors is an integer number (332735014059).

Almost surely, 2^665470028117 is an apocalyptic number.

It is an amenable number.

665470028117 is a deficient number, since it is larger than the sum of its proper divisors (1).

665470028117 is an equidigital number, since it uses as much as digits as its factorization.

665470028117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 665470028117 in words is "six hundred sixty-five billion, four hundred seventy million, twenty-eight thousand, one hundred seventeen".