669614431 has 2 divisors, whose sum is σ = 669614432. Its totient is φ = 669614430.

The previous prime is 669614417. The next prime is 669614443. The reversal of 669614431 is 134416966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669614431 - 2⁵ = 669614399 is a prime.

It is a super-2 number, since 2×669614431² = 896766972406907522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669614731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334807215 + 334807216.

It is an arithmetic number, because the mean of its divisors is an integer number (334807216).

Almost surely, 2^669614431 is an apocalyptic number.

669614431 is a deficient number, since it is larger than the sum of its proper divisors (1).

669614431 is an equidigital number, since it uses as much as digits as its factorization.

669614431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 669614431 is about 25876.9092242486. The cubic root of 669614431 is about 874.8661263485.

The spelling of 669614431 in words is "six hundred sixty-nine million, six hundred fourteen thousand, four hundred thirty-one".