669614417 has 2 divisors, whose sum is σ = 669614418. Its totient is φ = 669614416.

The previous prime is 669614399. The next prime is 669614431. The reversal of 669614417 is 714416966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373223761 + 296390656 = 19319^2 + 17216^2 .

It is a cyclic number.

It is not a de Polignac number, because 669614417 - 2⁸ = 669614161 is a prime.

It is not a weakly prime, because it can be changed into another prime (669614467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334807208 + 334807209.

It is an arithmetic number, because the mean of its divisors is an integer number (334807209).

Almost surely, 2^669614417 is an apocalyptic number.

It is an amenable number.

669614417 is a deficient number, since it is larger than the sum of its proper divisors (1).

669614417 is an equidigital number, since it uses as much as digits as its factorization.

669614417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 669614417 is about 25876.9089537371. The cubic root of 669614417 is about 874.8661202514.

The spelling of 669614417 in words is "six hundred sixty-nine million, six hundred fourteen thousand, four hundred seventeen".