2665538860 has 24 divisors (see below), whose sum is σ = 5600702016. Its totient is φ = 1065630720.

The previous prime is 2665538849. The next prime is 2665538879. The reversal of 2665538860 is 688355662.

2665538860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1804 + ... + 73036.

It is an arithmetic number, because the mean of its divisors is an integer number (233362584).

Almost surely, 2^2665538860 is an apocalyptic number.

2665538860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2665538860 is an abundant number, since it is smaller than the sum of its proper divisors (2935163156).

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

2665538860 is a wasteful number, since it uses less digits than its factorization.

2665538860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73113 (or 73111 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

The square root of 2665538860 is about 51628.8568535078. The cubic root of 2665538860 is about 1386.5270267679.

The spelling of 2665538860 in words is "two billion, six hundred sixty-five million, five hundred thirty-eight thousand, eight hundred sixty".