669026045 has 8 divisors (see below), whose sum is σ = 824529624. Its totient is φ = 520755264.

The previous prime is 669026023. The next prime is 669026051. The reversal of 669026045 is 540620966.

It can be written as a sum of positive squares in 4 ways, for example, as 33431524 + 635594521 = 5782^2 + 25211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669026045 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 1807994 + ... + 1808363.

It is an arithmetic number, because the mean of its divisors is an integer number (103066203).

Almost surely, 2^669026045 is an apocalyptic number.

It is an amenable number.

669026045 is a deficient number, since it is larger than the sum of its proper divisors (155503579).

669026045 is a wasteful number, since it uses less digits than its factorization.

669026045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616399.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 669026045 is about 25865.5377867927. The cubic root of 669026045 is about 874.6098047988.

The spelling of 669026045 in words is "six hundred sixty-nine million, twenty-six thousand, forty-five".