666032617 has 2 divisors, whose sum is σ = 666032618. Its totient is φ = 666032616.

The previous prime is 666032581. The next prime is 666032623. The reversal of 666032617 is 716230666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336392281 + 329640336 = 18341^2 + 18156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666032617 is a prime.

It is equal to p_34583284 and since 666032617 and 34583284 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 (666032677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333016308 + 333016309.

It is an arithmetic number, because the mean of its divisors is an integer number (333016309).

Almost surely, 2^666032617 is an apocalyptic number.

It is an amenable number.

666032617 is a deficient number, since it is larger than the sum of its proper divisors (1).

666032617 is an equidigital number, since it uses as much as digits as its factorization.

666032617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 666032617 is about 25807.6077349296. The cubic root of 666032617 is about 873.3034301897.

The spelling of 666032617 in words is "six hundred sixty-six million, thirty-two thousand, six hundred seventeen".