2661368775 has 48 divisors (see below), whose sum is σ = 4744592160. Its totient is φ = 1308556800.

The previous prime is 2661368767. The next prime is 2661368791. The reversal of 2661368775 is 5778631662.

2661368775 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2661368775 - 2³ = 2661368767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1197165 + ... + 1199385.

It is an arithmetic number, because the mean of its divisors is an integer number (98845670).

Almost surely, 2^2661368775 is an apocalyptic number.

2661368775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2661368775 is a deficient number, since it is larger than the sum of its proper divisors (2083223385).

2661368775 is a wasteful number, since it uses less digits than its factorization.

2661368775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3471 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The square root of 2661368775 is about 51588.4558307379. The cubic root of 2661368775 is about 1385.8036016427.

It can be divided in two parts, 266136 and 8775, that added together give a triangular number (274911 = T₇₄₁).

The spelling of 2661368775 in words is "two billion, six hundred sixty-one million, three hundred sixty-eight thousand, seven hundred seventy-five".