2271666566 has 24 divisors (see below), whose sum is σ = 3692824344. Its totient is φ = 1047596160.

The previous prime is 2271666539. The next prime is 2271666569. The reversal of 2271666566 is 6656661722.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2271666566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271666569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 602126 + ... + 605886.

It is an arithmetic number, because the mean of its divisors is an integer number (153867681).

Almost surely, 2^2271666566 is an apocalyptic number.

2271666566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2271666566 is a deficient number, since it is larger than the sum of its proper divisors (1421157778).

2271666566 is a wasteful number, since it uses less digits than its factorization.

2271666566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576 (or 5563 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 2271666566 is about 47662.0033779530. The cubic root of 2271666566 is about 1314.5633764660.

The spelling of 2271666566 in words is "two billion, two hundred seventy-one million, six hundred sixty-six thousand, five hundred sixty-six".