5609665669 has 4 divisors (see below), whose sum is σ = 5618178720. Its totient is φ = 5601152620.

The previous prime is 5609665657. The next prime is 5609665679. The reversal of 5609665669 is 9665669065.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5609665669 - 2⁵ = 5609665637 is a prime.

It is a super-2 number, since 2×5609665669² = 62936697835914435122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5609665609) 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, 4255537 + ... + 4256854.

It is an arithmetic number, because the mean of its divisors is an integer number (1404544680).

Almost surely, 2^5609665669 is an apocalyptic number.

It is an amenable number.

5609665669 is a deficient number, since it is larger than the sum of its proper divisors (8513051).

5609665669 is an equidigital number, since it uses as much as digits as its factorization.

5609665669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8513050.

The product of its (nonzero) digits is 15746400, while the sum is 58.

The square root of 5609665669 is about 74897.7013599216. The cubic root of 5609665669 is about 1776.8291050639.

The spelling of 5609665669 in words is "five billion, six hundred nine million, six hundred sixty-five thousand, six hundred sixty-nine".