669495587 has 2 divisors, whose sum is σ = 669495588. Its totient is φ = 669495586.

The previous prime is 669495559. The next prime is 669495611. The reversal of 669495587 is 785594966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669495587 - 2¹⁶ = 669430051 is a prime.

It is not a weakly prime, because it can be changed into another prime (669495287) 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, 334747793 + 334747794.

It is an arithmetic number, because the mean of its divisors is an integer number (334747794).

Almost surely, 2^669495587 is an apocalyptic number.

669495587 is a deficient number, since it is larger than the sum of its proper divisors (1).

669495587 is an equidigital number, since it uses as much as digits as its factorization.

669495587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 59.

The square root of 669495587 is about 25874.6127893733. The cubic root of 669495587 is about 874.8143658444.

The spelling of 669495587 in words is "six hundred sixty-nine million, four hundred ninety-five thousand, five hundred eighty-seven".