6664860673 has 4 divisors (see below), whose sum is σ = 6954637248. Its totient is φ = 6375084100.

The previous prime is 6664860647. The next prime is 6664860689. The reversal of 6664860673 is 3760684666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6664860673 - 2⁹ = 6664860161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6664860673.

It is not an unprimeable number, because it can be changed into a prime (6664860613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144888253 + ... + 144888298.

It is an arithmetic number, because the mean of its divisors is an integer number (1738659312).

Almost surely, 2^6664860673 is an apocalyptic number.

It is an amenable number.

6664860673 is a deficient number, since it is larger than the sum of its proper divisors (289776575).

6664860673 is a wasteful number, since it uses less digits than its factorization.

6664860673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289776574.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The square root of 6664860673 is about 81638.5979362703. The cubic root of 6664860673 is about 1881.9020919024.

The spelling of 6664860673 in words is "six billion, six hundred sixty-four million, eight hundred sixty thousand, six hundred seventy-three".