669358265 has 4 divisors (see below), whose sum is σ = 803229924. Its totient is φ = 535486608.

The previous prime is 669358241. The next prime is 669358301. The reversal of 669358265 is 562853966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562853966 = 2 ⋅281426983.

It can be written as a sum of positive squares in 2 ways, for example, as 388996729 + 280361536 = 19723^2 + 16744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669358265 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 66935822 + ... + 66935831.

It is an arithmetic number, because the mean of its divisors is an integer number (200807481).

Almost surely, 2^669358265 is an apocalyptic number.

It is an amenable number.

669358265 is a deficient number, since it is larger than the sum of its proper divisors (133871659).

669358265 is a wasteful number, since it uses less digits than its factorization.

669358265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133871658.

The product of its digits is 2332800, while the sum is 50.

The square root of 669358265 is about 25871.9590483597. The cubic root of 669358265 is about 874.7545499297.

The spelling of 669358265 in words is "six hundred sixty-nine million, three hundred fifty-eight thousand, two hundred sixty-five".