669532369 has 24 divisors (see below), whose sum is σ = 809713728. Its totient is φ = 547895040.

The previous prime is 669532363. The next prime is 669532373. The reversal of 669532369 is 963235966.

It is not a de Polignac number, because 669532369 - 2²¹ = 667435217 is a prime.

It is a super-2 number, since 2×669532369² = 896547186277504322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669532363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68539 + ... + 77695.

It is an arithmetic number, because the mean of its divisors is an integer number (33738072).

Almost surely, 2^669532369 is an apocalyptic number.

It is an amenable number.

669532369 is a deficient number, since it is larger than the sum of its proper divisors (140181359).

669532369 is a wasteful number, since it uses less digits than its factorization.

669532369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9225 (or 9208 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 49.

The square root of 669532369 is about 25875.3235535326. The cubic root of 669532369 is about 874.8303862799.

The spelling of 669532369 in words is "six hundred sixty-nine million, five hundred thirty-two thousand, three hundred sixty-nine".