5665666043 has 8 divisors (see below), whose sum is σ = 5709609216. Its totient is φ = 5621872000.

The previous prime is 5665666021. The next prime is 5665666049. The reversal of 5665666043 is 3406665665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5665666043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5665666049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39605 + ... + 113577.

It is an arithmetic number, because the mean of its divisors is an integer number (713701152).

Almost surely, 2^5665666043 is an apocalyptic number.

5665666043 is a deficient number, since it is larger than the sum of its proper divisors (43943173).

5665666043 is a wasteful number, since it uses less digits than its factorization.

5665666043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74565.

The product of its (nonzero) digits is 2332800, while the sum is 47.

The square root of 5665666043 is about 75270.6187233771. The cubic root of 5665666043 is about 1782.7221366494.

The spelling of 5665666043 in words is "five billion, six hundred sixty-five million, six hundred sixty-six thousand, forty-three".