669507285 has 32 divisors (see below), whose sum is σ = 1085306112. Its totient is φ = 352396800.

The previous prime is 669507283. The next prime is 669507301. The reversal of 669507285 is 582705966.

It is a happy number.

It is not a de Polignac number, because 669507285 - 2¹ = 669507283 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669507283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691872 + ... + 692838.

It is an arithmetic number, because the mean of its divisors is an integer number (33915816).

Almost surely, 2^669507285 is an apocalyptic number.

It is an amenable number.

669507285 is a deficient number, since it is larger than the sum of its proper divisors (415798827).

669507285 is a wasteful number, since it uses less digits than its factorization.

669507285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533.

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 669507285 is about 25874.8388400778. The cubic root of 669507285 is about 874.8194609832.

The spelling of 669507285 in words is "six hundred sixty-nine million, five hundred seven thousand, two hundred eighty-five".