669565593 has 12 divisors (see below), whose sum is σ = 973312548. Its totient is φ = 443532960.

The previous prime is 669565591. The next prime is 669565609. The reversal of 669565593 is 395565966.

669565593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 207014544 + 462551049 = 14388^2 + 21507^2 .

It is not a de Polignac number, because 669565593 - 2¹ = 669565591 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669565591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235518 + ... + 238343.

It is an arithmetic number, because the mean of its divisors is an integer number (81109379).

Almost surely, 2^669565593 is an apocalyptic number.

It is an amenable number.

669565593 is a deficient number, since it is larger than the sum of its proper divisors (303746955).

669565593 is a wasteful number, since it uses less digits than its factorization.

669565593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474024 (or 474021 counting only the distinct ones).

The product of its digits is 6561000, while the sum is 54.

The square root of 669565593 is about 25875.9655472023. The cubic root of 669565593 is about 874.8448565208.

It can be divided in two parts, 66 and 9565593, that added together give a palindrome (9565659).

The spelling of 669565593 in words is "six hundred sixty-nine million, five hundred sixty-five thousand, five hundred ninety-three".