669361045 has 12 divisors (see below), whose sum is σ = 806250564. Its totient is φ = 533483520.

The previous prime is 669360983. The next prime is 669361061. The reversal of 669361045 is 540163966.

It can be written as a sum of positive squares in 6 ways, for example, as 196168036 + 473193009 = 14006^2 + 21753^2 .

It is a de Polignac number, because none of the positive numbers 2^k-669361045 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669360989 and 669361007.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 1043925 + ... + 1044565.

It is an arithmetic number, because the mean of its divisors is an integer number (67187547).

Almost surely, 2^669361045 is an apocalyptic number.

It is an amenable number.

669361045 is a deficient number, since it is larger than the sum of its proper divisors (136889519).

669361045 is an frugal number, since it uses more digits than its factorization.

669361045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 669361045 is about 25872.0127744248. The cubic root of 669361045 is about 874.7557609475.

The spelling of 669361045 in words is "six hundred sixty-nine million, three hundred sixty-one thousand, forty-five".