2221660456 has 32 divisors (see below), whose sum is σ = 4207933800. Its totient is φ = 1099571200.

The previous prime is 2221660447. The next prime is 2221660471. The reversal of 2221660456 is 6540661222.

It can be written as a sum of positive squares in 4 ways, for example, as 455139556 + 1766520900 = 21334^2 + 42030^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175160 + ... + 1177048.

Almost surely, 2^2221660456 is an apocalyptic number.

It is an amenable number.

2221660456 is a deficient number, since it is larger than the sum of its proper divisors (1986273344).

2221660456 is a wasteful number, since it uses less digits than its factorization.

2221660456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3305 counting only the distinct ones).

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

The square root of 2221660456 is about 47134.4932719129. The cubic root of 2221660456 is about 1304.8459091021.

The spelling of 2221660456 in words is "two billion, two hundred twenty-one million, six hundred sixty thousand, four hundred fifty-six".