2665222011540 has 72 divisors (see below), whose sum is σ = 8819461935648. Its totient is φ = 646114426560.

The previous prime is 2665222011527. The next prime is 2665222011541. The reversal of 2665222011540 is 451102225662.

2665222011540 is a `hidden beast` number, since 2 + 6 + 65 + 22 + 20 + 11 + 540 = 666.

2665222011540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2665222011495 and 2665222011504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665222011541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 673033882 + ... + 673037841.

It is an arithmetic number, because the mean of its divisors is an integer number (122492526884).

Almost surely, 2^{2665222011540} is an apocalyptic number.

2665222011540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2665222011540 is an abundant number, since it is smaller than the sum of its proper divisors (6154239924108).

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

2665222011540 is a wasteful number, since it uses less digits than its factorization.

2665222011540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346071749 (or 1346071744 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 2665222011540 in words is "two trillion, six hundred sixty-five billion, two hundred twenty-two million, eleven thousand, five hundred forty".