2265666615 has 72 divisors (see below), whose sum is σ = 4107259728. Its totient is φ = 1155248640.

The previous prime is 2265666593. The next prime is 2265666649. The reversal of 2265666615 is 5166665622.

It is a happy number.

It is not a de Polignac number, because 2265666615 - 2¹¹ = 2265664567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4957467 + ... + 4957923.

It is an arithmetic number, because the mean of its divisors is an integer number (57045274).

Almost surely, 2^2265666615 is an apocalyptic number.

2265666615 is a deficient number, since it is larger than the sum of its proper divisors (1841593113).

2265666615 is a wasteful number, since it uses less digits than its factorization.

2265666615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 625 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 2265666615 is about 47599.0190550184. The cubic root of 2265666615 is about 1313.4050095658.

The spelling of 2265666615 in words is "two billion, two hundred sixty-five million, six hundred sixty-six thousand, six hundred fifteen".