2265506666 has 16 divisors (see below), whose sum is σ = 3602574144. Its totient is φ = 1064812224.

The previous prime is 2265506653. The next prime is 2265506669. The reversal of 2265506666 is 6666055622.

It is not an unprimeable number, because it can be changed into a prime (2265506669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12500 + ... + 68463.

It is an arithmetic number, because the mean of its divisors is an integer number (225160884).

Almost surely, 2^2265506666 is an apocalyptic number.

2265506666 is a deficient number, since it is larger than the sum of its proper divisors (1337067478).

2265506666 is a wasteful number, since it uses less digits than its factorization.

2265506666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81805.

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 2265506666 is about 47597.3388541839. The cubic root of 2265506666 is about 1313.3741014054.

The spelling of 2265506666 in words is "two billion, two hundred sixty-five million, five hundred six thousand, six hundred sixty-six".