2666343556 has 12 divisors (see below), whose sum is σ = 4666563468. Its totient is φ = 1333039712.

The previous prime is 2666343523. The next prime is 2666343571. The reversal of 2666343556 is 6553436662.

2666343556 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 1194393600 + 1471949956 = 34560^2 + 38366^2 .

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, 22950 + ... + 76546.

It is an arithmetic number, because the mean of its divisors is an integer number (388880289).

Almost surely, 2^2666343556 is an apocalyptic number.

It is an amenable number.

2666343556 is a deficient number, since it is larger than the sum of its proper divisors (2000219912).

2666343556 is a wasteful number, since it uses less digits than its factorization.

2666343556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66038 (or 66036 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 46.

The square root of 2666343556 is about 51636.6493490815. The cubic root of 2666343556 is about 1386.6665383331. Note that the first 3 decimals are identical.

The spelling of 2666343556 in words is "two billion, six hundred sixty-six million, three hundred forty-three thousand, five hundred fifty-six".