2166071265226 has 32 divisors (see below), whose sum is σ = 3882392182080. Its totient is φ = 894707654400.

The previous prime is 2166071265203. The next prime is 2166071265233. The reversal of 2166071265226 is 6225621706612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99844920 + ... + 99866611.

It is an arithmetic number, because the mean of its divisors is an integer number (121324755690).

Almost surely, 2^{2166071265226} is an apocalyptic number.

2166071265226 is a deficient number, since it is larger than the sum of its proper divisors (1716320916854).

2166071265226 is a wasteful number, since it uses less digits than its factorization.

2166071265226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199711590.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 2166071265226 in words is "two trillion, one hundred sixty-six billion, seventy-one million, two hundred sixty-five thousand, two hundred twenty-six".