6665444433 has 6 divisors (see below), whose sum is σ = 9627864194. Its totient is φ = 4443629616.

The previous prime is 6665444431. The next prime is 6665444537. The reversal of 6665444433 is 3344445666.

It can be written as a sum of positive squares in only one way, i.e., 6092895249 + 572549184 = 78057^2 + 23928^2 .

It is not a de Polignac number, because 6665444433 - 2¹ = 6665444431 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6665444431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370302460 + ... + 370302477.

Almost surely, 2^6665444433 is an apocalyptic number.

It is an amenable number.

6665444433 is a deficient number, since it is larger than the sum of its proper divisors (2962419761).

6665444433 is a wasteful number, since it uses less digits than its factorization.

6665444433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740604943 (or 740604940 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 45.

The square root of 6665444433 is about 81642.1731276183. The cubic root of 6665444433 is about 1881.9570341409.

The spelling of 6665444433 in words is "six billion, six hundred sixty-five million, four hundred forty-four thousand, four hundred thirty-three".