5561666669 has 8 divisors (see below), whose sum is σ = 6003389952. Its totient is φ = 5121929520.

The previous prime is 5561666653. The next prime is 5561666713. The reversal of 5561666669 is 9666661655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5561666669 - 2⁴ = 5561666653 is a prime.

It is a super-2 number, since 2×5561666669² = 61864272274131111122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561666629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490709 + ... + 501914.

It is an arithmetic number, because the mean of its divisors is an integer number (750423744).

Almost surely, 2^5561666669 is an apocalyptic number.

It is an amenable number.

5561666669 is a deficient number, since it is larger than the sum of its proper divisors (441723283).

5561666669 is a wasteful number, since it uses less digits than its factorization.

5561666669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993067.

The product of its digits is 10497600, while the sum is 56.

The square root of 5561666669 is about 74576.5825779111. The cubic root of 5561666669 is about 1771.7467800422.

The spelling of 5561666669 in words is "five billion, five hundred sixty-one million, six hundred sixty-six thousand, six hundred sixty-nine".