2199563966 has 4 divisors (see below), whose sum is σ = 3299345952. Its totient is φ = 1099781982.

The previous prime is 2199563923. The next prime is 2199563969. The reversal of 2199563966 is 6693659912.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199563969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549890990 + ... + 549890993.

It is an arithmetic number, because the mean of its divisors is an integer number (824836488).

Almost surely, 2^2199563966 is an apocalyptic number.

2199563966 is a deficient number, since it is larger than the sum of its proper divisors (1099781986).

2199563966 is a wasteful number, since it uses less digits than its factorization.

2199563966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099781985.

The product of its digits is 4723920, while the sum is 56.

The square root of 2199563966 is about 46899.5092298416. The cubic root of 2199563966 is about 1300.5055166149.

The spelling of 2199563966 in words is "two billion, one hundred ninety-nine million, five hundred sixty-three thousand, nine hundred sixty-six".