2665246815 has 128 divisors (see below), whose sum is σ = 5962291200. Its totient is φ = 1097349120.

The previous prime is 2665246811. The next prime is 2665246841. The reversal of 2665246815 is 5186425662.

2665246815 is a `hidden beast` number, since 2 + 66 + 524 + 68 + 1 + 5 = 666.

It is not a de Polignac number, because 2665246815 - 2² = 2665246811 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 not an unprimeable number, because it can be changed into a prime (2665246811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1173501 + ... + 1175769.

It is an arithmetic number, because the mean of its divisors is an integer number (46580400).

Almost surely, 2^2665246815 is an apocalyptic number.

2665246815 is an abundant number, since it is smaller than the sum of its proper divisors (3297044385).

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

2665246815 is a wasteful number, since it uses less digits than its factorization.

2665246815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414 (or 2408 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 2665246815 is about 51626.0284643318. The cubic root of 2665246815 is about 1386.4763874668.

The spelling of 2665246815 in words is "two billion, six hundred sixty-five million, two hundred forty-six thousand, eight hundred fifteen".