5644160666 has 4 divisors (see below), whose sum is σ = 8466241002. Its totient is φ = 2822080332.

The previous prime is 5644160657. The next prime is 5644160707. The reversal of 5644160666 is 6660614465.

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., 3645623641 + 1998537025 = 60379^2 + 44705^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1411040165 + ... + 1411040168.

Almost surely, 2^5644160666 is an apocalyptic number.

5644160666 is a deficient number, since it is larger than the sum of its proper divisors (2822080336).

5644160666 is a wasteful number, since it uses less digits than its factorization.

5644160666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822080335.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 5644160666 is about 75127.6291786184. The cubic root of 5644160666 is about 1780.4636954223.

The spelling of 5644160666 in words is "five billion, six hundred forty-four million, one hundred sixty thousand, six hundred sixty-six".