2666720288 has 24 divisors (see below), whose sum is σ = 5431145580. Its totient is φ = 1287381760.

The previous prime is 2666720269. The next prime is 2666720299. The reversal of 2666720288 is 8820276662.

2666720288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2581859344 + 84860944 = 50812^2 + 9212^2 .

It is a super-2 number, since 2×2666720288² = 14222794188861605888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435883 + ... + 1437738.

Almost surely, 2^2666720288 is an apocalyptic number.

It is an amenable number.

2666720288 is an abundant number, since it is smaller than the sum of its proper divisors (2764425292).

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

2666720288 is a wasteful number, since it uses less digits than its factorization.

2666720288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873660 (or 2873652 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 2666720288 is about 51640.2971331498. The cubic root of 2666720288 is about 1386.7318433780.

The spelling of 2666720288 in words is "two billion, six hundred sixty-six million, seven hundred twenty thousand, two hundred eighty-eight".