2665266555 has 48 divisors (see below), whose sum is σ = 4994157600. Its totient is φ = 1210180608.

The previous prime is 2665266551. The next prime is 2665266557. The reversal of 2665266555 is 5556625662.

2665266555 is a nontrivial binomial coefficient, being equal to C(73011, 2).

It is not a de Polignac number, because 2665266555 - 2² = 2665266551 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2665266551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97347 + ... + 121683.

It is an arithmetic number, because the mean of its divisors is an integer number (104044950).

Almost surely, 2^2665266555 is an apocalyptic number.

2665266555 is the 73010-th triangular number.

2665266555 is a deficient number, since it is larger than the sum of its proper divisors (2328891045).

2665266555 is a wasteful number, since it uses less digits than its factorization.

2665266555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24508 (or 24501 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The square root of 2665266555 is about 51626.2196466098. The cubic root of 2665266555 is about 1386.4798104114.

The spelling of 2665266555 in words is "two billion, six hundred sixty-five million, two hundred sixty-six thousand, five hundred fifty-five".