2166252606 has 64 divisors (see below), whose sum is σ = 5507251200. Its totient is φ = 618293088.

The previous prime is 2166252563. The next prime is 2166252611. The reversal of 2166252606 is 6062526612.

2166252606 is a `hidden beast` number, since 2 + 1 + 6 + 625 + 26 + 0 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 462231 + ... + 466893.

It is an arithmetic number, because the mean of its divisors is an integer number (86050800).

Almost surely, 2^2166252606 is an apocalyptic number.

2166252606 is an abundant number, since it is smaller than the sum of its proper divisors (3340998594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166252606 is a wasteful number, since it uses less digits than its factorization.

2166252606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5910 (or 5904 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2166252606 is about 46543.0188750150. The cubic root of 2166252606 is about 1293.9069116131.

The spelling of 2166252606 in words is "two billion, one hundred sixty-six million, two hundred fifty-two thousand, six hundred six".