2646610566 has 16 divisors (see below), whose sum is σ = 5296932144. Its totient is φ = 881585024.

The previous prime is 2646610553. The next prime is 2646610573. The reversal of 2646610566 is 6650166462.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145311 + ... + 162506.

It is an arithmetic number, because the mean of its divisors is an integer number (331058259).

Almost surely, 2^2646610566 is an apocalyptic number.

2646610566 is an abundant number, since it is smaller than the sum of its proper divisors (2650321578).

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

2646610566 is a wasteful number, since it uses less digits than its factorization.

2646610566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309255.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 2646610566 is about 51445.2190781612. The cubic root of 2646610566 is about 1383.2372655145.

It can be divided in two parts, 2646 and 610566, that multiplied together give a square (1615557636 = 40194²).

The spelling of 2646610566 in words is "two billion, six hundred forty-six million, six hundred ten thousand, five hundred sixty-six".