2221666252 has 48 divisors (see below), whose sum is σ = 4247147520. Its totient is φ = 1010751552.

The previous prime is 2221666211. The next prime is 2221666253. The reversal of 2221666252 is 2526661222.

It is not an unprimeable number, because it can be changed into a prime (2221666253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1262149 + ... + 1263907.

It is an arithmetic number, because the mean of its divisors is an integer number (88482240).

Almost surely, 2^2221666252 is an apocalyptic number.

It is an amenable number.

2221666252 is a deficient number, since it is larger than the sum of its proper divisors (2025481268).

2221666252 is a wasteful number, since it uses less digits than its factorization.

2221666252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110 (or 2108 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 2221666252 is about 47134.5547555082. The cubic root of 2221666252 is about 1304.8470438210.

The spelling of 2221666252 in words is "two billion, two hundred twenty-one million, six hundred sixty-six thousand, two hundred fifty-two".