5643230666 has 4 divisors (see below), whose sum is σ = 8464846002. Its totient is φ = 2821615332.

The previous prime is 5643230653. The next prime is 5643230687. The reversal of 5643230666 is 6660323465.

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

It can be written as a sum of positive squares in only one way, i.e., 3492219025 + 2151011641 = 59095^2 + 46379^2 .

It is an unprimeable number.

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, 1410807665 + ... + 1410807668.

Almost surely, 2^5643230666 is an apocalyptic number.

5643230666 is a deficient number, since it is larger than the sum of its proper divisors (2821615336).

5643230666 is a wasteful number, since it uses less digits than its factorization.

5643230666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821615335.

The product of its (nonzero) digits is 466560, while the sum is 41.

The square root of 5643230666 is about 75121.4394563895. The cubic root of 5643230666 is about 1780.3658998251.

The spelling of 5643230666 in words is "five billion, six hundred forty-three million, two hundred thirty thousand, six hundred sixty-six".