669081607 has 2 divisors, whose sum is σ = 669081608. Its totient is φ = 669081606.

The previous prime is 669081577. The next prime is 669081629. The reversal of 669081607 is 706180966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669081607 - 2¹⁹ = 668557319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669031607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334540803 + 334540804.

It is an arithmetic number, because the mean of its divisors is an integer number (334540804).

Almost surely, 2^669081607 is an apocalyptic number.

669081607 is a deficient number, since it is larger than the sum of its proper divisors (1).

669081607 is an equidigital number, since it uses as much as digits as its factorization.

669081607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 669081607 is about 25866.6118190999. The cubic root of 669081607 is about 874.6340159761.

The spelling of 669081607 in words is "six hundred sixty-nine million, eighty-one thousand, six hundred seven".