6664493 has 16 divisors (see below), whose sum is σ = 7781184. Its totient is φ = 5640960.

The previous prime is 6664481. The next prime is 6664501. The reversal of 6664493 is 3944666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6664493 - 2⁶ = 6664429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664453) 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, 29246 + ... + 29472.

It is an arithmetic number, because the mean of its divisors is an integer number (486324).

Almost surely, 2^6664493 is an apocalyptic number.

It is an amenable number.

6664493 is a deficient number, since it is larger than the sum of its proper divisors (1116691).

6664493 is a wasteful number, since it uses less digits than its factorization.

6664493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412.

The product of its digits is 93312, while the sum is 38.

The square root of 6664493 is about 2581.5679344151. The cubic root of 6664493 is about 188.1867485662.

The spelling of 6664493 in words is "six million, six hundred sixty-four thousand, four hundred ninety-three".