2665247249 has 24 divisors (see below), whose sum is σ = 3268808640. Its totient is φ = 2160787104.

The previous prime is 2665247243. The next prime is 2665247257. The reversal of 2665247249 is 9427425662.

2665247249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2665247249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2665247243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 689807 + ... + 693659.

It is an arithmetic number, because the mean of its divisors is an integer number (136200360).

Almost surely, 2^2665247249 is an apocalyptic number.

It is an amenable number.

2665247249 is a deficient number, since it is larger than the sum of its proper divisors (603561391).

2665247249 is a wasteful number, since it uses less digits than its factorization.

2665247249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629 (or 4622 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The square root of 2665247249 is about 51626.0326676377. The cubic root of 2665247249 is about 1386.4764627232.

The spelling of 2665247249 in words is "two billion, six hundred sixty-five million, two hundred forty-seven thousand, two hundred forty-nine".