666953017 has 2 divisors, whose sum is σ = 666953018. Its totient is φ = 666953016.

The previous prime is 666952981. The next prime is 666953033. The reversal of 666953017 is 710359666.

666953017 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., 458987776 + 207965241 = 21424^2 + 14421^2 .

It is a cyclic number.

It is not a de Polignac number, because 666953017 - 2²⁷ = 532735289 is a prime.

It is not a weakly prime, because it can be changed into another prime (666953047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333476508 + 333476509.

It is an arithmetic number, because the mean of its divisors is an integer number (333476509).

Almost surely, 2^666953017 is an apocalyptic number.

It is an amenable number.

666953017 is a deficient number, since it is larger than the sum of its proper divisors (1).

666953017 is an equidigital number, since it uses as much as digits as its factorization.

666953017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 666953017 is about 25825.4335297590. The cubic root of 666953017 is about 873.7055218616.

The spelling of 666953017 in words is "six hundred sixty-six million, nine hundred fifty-three thousand, seventeen".