2166610227655 has 16 divisors (see below), whose sum is σ = 2825053747200. Its totient is φ = 1589092728480.

The previous prime is 2166610227653. The next prime is 2166610227671. The reversal of 2166610227655 is 5567220166612.

It is not a de Polignac number, because 2166610227655 - 2¹ = 2166610227653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166610227599 and 2166610227608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166610227653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367842595 + ... + 367848484.

It is an arithmetic number, because the mean of its divisors is an integer number (176565859200).

Almost surely, 2^{2166610227655} is an apocalyptic number.

2166610227655 is a deficient number, since it is larger than the sum of its proper divisors (658443519545).

2166610227655 is a wasteful number, since it uses less digits than its factorization.

2166610227655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735691134.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 2166610227655 in words is "two trillion, one hundred sixty-six billion, six hundred ten million, two hundred twenty-seven thousand, six hundred fifty-five".