2666806272 has 132 divisors (see below), whose sum is σ = 8293052040. Its totient is φ = 820518912.

The previous prime is 2666806267. The next prime is 2666806297. The reversal of 2666806272 is 2726086662.

It is a super-2 number, since 2×2666806272² = 14223711384757075968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108679 + ... + 130937.

Almost surely, 2^2666806272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666806272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4146526020).

2666806272 is an abundant number, since it is smaller than the sum of its proper divisors (5626245768).

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

2666806272 is a wasteful number, since it uses less digits than its factorization.

2666806272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22298 (or 22277 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 2666806272 is about 51641.1296545689. The cubic root of 2666806272 is about 1386.7467475119.

The spelling of 2666806272 in words is "two billion, six hundred sixty-six million, eight hundred six thousand, two hundred seventy-two".