6666260645 has 32 divisors (see below), whose sum is σ = 8949553920. Its totient is φ = 4725952000.

The previous prime is 6666260639. The next prime is 6666260687. The reversal of 6666260645 is 5460626666.

6666260645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6666260645 - 2⁶ = 6666260581 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6666260645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337955 + ... + 357135.

It is an arithmetic number, because the mean of its divisors is an integer number (279673560).

Almost surely, 2^6666260645 is an apocalyptic number.

It is an amenable number.

6666260645 is a deficient number, since it is larger than the sum of its proper divisors (2283293275).

6666260645 is a wasteful number, since it uses less digits than its factorization.

6666260645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19357.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The square root of 6666260645 is about 81647.1716901449. The cubic root of 6666260645 is about 1882.0338488847.

The spelling of 6666260645 in words is "six billion, six hundred sixty-six million, two hundred sixty thousand, six hundred forty-five".