2261566166 has 8 divisors (see below), whose sum is σ = 3471241224. Its totient is φ = 1104485760.

The previous prime is 2261566081. The next prime is 2261566169. The reversal of 2261566166 is 6616651622.

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

It is a super-2 number, since 2×2261566166² = 10229363046391879112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261566169) 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, 13148555 + ... + 13148726.

It is an arithmetic number, because the mean of its divisors is an integer number (433905153).

Almost surely, 2^2261566166 is an apocalyptic number.

2261566166 is a deficient number, since it is larger than the sum of its proper divisors (1209675058).

2261566166 is a wasteful number, since it uses less digits than its factorization.

2261566166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26297326.

The product of its digits is 155520, while the sum is 41.

The square root of 2261566166 is about 47555.9267179181. The cubic root of 2261566166 is about 1312.6121888198.

The spelling of 2261566166 in words is "two billion, two hundred sixty-one million, five hundred sixty-six thousand, one hundred sixty-six".