2666571872 has 48 divisors (see below), whose sum is σ = 5533239600. Its totient is φ = 1261486080.

The previous prime is 2666571871. The next prime is 2666571877. The reversal of 2666571872 is 2781756662.

It is a super-2 number, since 2×2666571872² = 14221211097083168768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2666571872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666571871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562472 + ... + 567192.

It is an arithmetic number, because the mean of its divisors is an integer number (115275825).

Almost surely, 2^2666571872 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 2666571872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2766619800).

2666571872 is an abundant number, since it is smaller than the sum of its proper divisors (2866667728).

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

2666571872 is a wasteful number, since it uses less digits than its factorization.

2666571872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679 (or 5671 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The square root of 2666571872 is about 51638.8600958619. The cubic root of 2666571872 is about 1386.7061167688.

The spelling of 2666571872 in words is "two billion, six hundred sixty-six million, five hundred seventy-one thousand, eight hundred seventy-two".