5561115665 has 8 divisors (see below), whose sum is σ = 7626672960. Its totient is φ = 3813336432.

The previous prime is 5561115649. The next prime is 5561115673. The reversal of 5561115665 is 5665111655.

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 5561115665 - 2⁴ = 5561115649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79444475 + ... + 79444544.

It is an arithmetic number, because the mean of its divisors is an integer number (953334120).

Almost surely, 2^5561115665 is an apocalyptic number.

It is an amenable number.

5561115665 is a deficient number, since it is larger than the sum of its proper divisors (2065557295).

5561115665 is a wasteful number, since it uses less digits than its factorization.

5561115665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158889031.

The product of its digits is 135000, while the sum is 41.

The square root of 5561115665 is about 74572.8882704700. Note that the first 3 decimals coincide. The cubic root of 5561115665 is about 1771.6882680972.

The spelling of 5561115665 in words is "five billion, five hundred sixty-one million, one hundred fifteen thousand, six hundred sixty-five".