669134617 has 2 divisors, whose sum is σ = 669134618. Its totient is φ = 669134616.

The previous prime is 669134581. The next prime is 669134623. The reversal of 669134617 is 716431966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411724681 + 257409936 = 20291^2 + 16044^2 .

It is a cyclic number.

It is not a de Polignac number, because 669134617 - 2⁷ = 669134489 is a prime.

It is a super-2 number, since 2×669134617² = 895482271335473378, which contains 22 as substring.

It is equal to p_34735795 and since 669134617 and 34735795 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (669144617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334567308 + 334567309.

It is an arithmetic number, because the mean of its divisors is an integer number (334567309).

Almost surely, 2^669134617 is an apocalyptic number.

It is an amenable number.

669134617 is a deficient number, since it is larger than the sum of its proper divisors (1).

669134617 is an equidigital number, since it uses as much as digits as its factorization.

669134617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 669134617 is about 25867.6364788127. The cubic root of 669134617 is about 874.6571138685.

The spelling of 669134617 in words is "six hundred sixty-nine million, one hundred thirty-four thousand, six hundred seventeen".