669253345 has 4 divisors (see below), whose sum is σ = 803104020. Its totient is φ = 535402672.

The previous prime is 669253339. The next prime is 669253349. The reversal of 669253345 is 543352966.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99380961 + 569872384 = 9969^2 + 23872^2 .

It is a cyclic number.

It is not a de Polignac number, because 669253345 - 2³ = 669253337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669253349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66925330 + ... + 66925339.

It is an arithmetic number, because the mean of its divisors is an integer number (200776005).

Almost surely, 2^669253345 is an apocalyptic number.

It is an amenable number.

669253345 is a deficient number, since it is larger than the sum of its proper divisors (133850675).

669253345 is a wasteful number, since it uses less digits than its factorization.

669253345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133850674.

The product of its digits is 583200, while the sum is 43.

The square root of 669253345 is about 25869.9312909795. The cubic root of 669253345 is about 874.7088424474.

The spelling of 669253345 in words is "six hundred sixty-nine million, two hundred fifty-three thousand, three hundred forty-five".