5561166165 has 16 divisors (see below), whose sum is σ = 8956795776. Its totient is φ = 2946312000.

The previous prime is 5561166161. The next prime is 5561166197. The reversal of 5561166165 is 5616611655.

It is not a de Polignac number, because 5561166165 - 2² = 5561166161 is a prime.

It is a super-2 number, since 2×5561166165² = 61853138229481614450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561166161) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1225366 + ... + 1229895.

It is an arithmetic number, because the mean of its divisors is an integer number (559799736).

Almost surely, 2^5561166165 is an apocalyptic number.

It is an amenable number.

5561166165 is a deficient number, since it is larger than the sum of its proper divisors (3395629611).

5561166165 is a wasteful number, since it uses less digits than its factorization.

5561166165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455420.

The product of its digits is 162000, while the sum is 42.

The square root of 5561166165 is about 74573.2268646060. The cubic root of 5561166165 is about 1771.6936309292.

The spelling of 5561166165 in words is "five billion, five hundred sixty-one million, one hundred sixty-six thousand, one hundred sixty-five".