6665555443 has 8 divisors (see below), whose sum is σ = 6829534656. Its totient is φ = 6501643200.

The previous prime is 6665555417. The next prime is 6665555447. The reversal of 6665555443 is 3445555666.

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

It is a cyclic number.

It is not a de Polignac number, because 6665555443 - 2²⁵ = 6632001011 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6665555447) 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, 228253 + ... + 255793.

It is an arithmetic number, because the mean of its divisors is an integer number (853691832).

Almost surely, 2^6665555443 is an apocalyptic number.

6665555443 is a deficient number, since it is larger than the sum of its proper divisors (163979213).

6665555443 is a wasteful number, since it uses less digits than its factorization.

6665555443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33485.

The product of its digits is 6480000, while the sum is 49.

The square root of 6665555443 is about 81642.8529817522. The cubic root of 6665555443 is about 1881.9674818008.

The spelling of 6665555443 in words is "six billion, six hundred sixty-five million, five hundred fifty-five thousand, four hundred forty-three".