6666664445 has 16 divisors (see below), whose sum is σ = 9163238400. Its totient is φ = 4561234944.

The previous prime is 6666664429. The next prime is 6666664447. The reversal of 6666664445 is 5444666666.

It is not a de Polignac number, because 6666664445 - 2⁴ = 6666664429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666664447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196397 + ... + 227826.

It is an arithmetic number, because the mean of its divisors is an integer number (572702400).

Almost surely, 2^6666664445 is an apocalyptic number.

It is an amenable number.

6666664445 is a deficient number, since it is larger than the sum of its proper divisors (2496573955).

6666664445 is a wasteful number, since it uses less digits than its factorization.

6666664445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424684.

The product of its digits is 14929920, while the sum is 53.

The square root of 6666664445 is about 81649.6444878972. The cubic root of 6666664445 is about 1882.0718486952.

The spelling of 6666664445 in words is "six billion, six hundred sixty-six million, six hundred sixty-four thousand, four hundred forty-five".