669365602 has 4 divisors (see below), whose sum is σ = 1004048406. Its totient is φ = 334682800.

The previous prime is 669365581. The next prime is 669365603. The reversal of 669365602 is 206563966.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 640646721 + 28718881 = 25311^2 + 5359^2 .

It is not an unprimeable number, because it can be changed into a prime (669365603) 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, 167341399 + ... + 167341402.

Almost surely, 2^669365602 is an apocalyptic number.

669365602 is a deficient number, since it is larger than the sum of its proper divisors (334682804).

669365602 is a wasteful number, since it uses less digits than its factorization.

669365602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334682803.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 669365602 is about 25872.1008424132. The cubic root of 669365602 is about 874.7577460510.

The spelling of 669365602 in words is "six hundred sixty-nine million, three hundred sixty-five thousand, six hundred two".