2766661155 has 48 divisors (see below), whose sum is σ = 5053620000. Its totient is φ = 1396320768.

The previous prime is 2766661147. The next prime is 2766661207. The reversal of 2766661155 is 5511666672.

It is not a de Polignac number, because 2766661155 - 2³ = 2766661147 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2766661155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1323351 + ... + 1325439.

It is an arithmetic number, because the mean of its divisors is an integer number (105283750).

Almost surely, 2^2766661155 is an apocalyptic number.

2766661155 is a deficient number, since it is larger than the sum of its proper divisors (2286958845).

2766661155 is a wasteful number, since it uses less digits than its factorization.

2766661155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668 (or 3665 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 2766661155 is about 52599.0604003532. The cubic root of 2766661155 is about 1403.8433771642.

The spelling of 2766661155 in words is "two billion, seven hundred sixty-six million, six hundred sixty-one thousand, one hundred fifty-five".