6664766 has 4 divisors (see below), whose sum is σ = 9997152. Its totient is φ = 3332382.

The previous prime is 6664759. The next prime is 6664769. The reversal of 6664766 is 6674666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6674666 = 2 ⋅3337333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666190 + ... + 1666193.

It is an arithmetic number, because the mean of its divisors is an integer number (2499288).

Almost surely, 2^6664766 is an apocalyptic number.

6664766 is a deficient number, since it is larger than the sum of its proper divisors (3332386).

6664766 is a wasteful number, since it uses less digits than its factorization.

6664766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332385.

The product of its digits is 217728, while the sum is 41.

The square root of 6664766 is about 2581.6208087169. The cubic root of 6664766 is about 188.1893181181.

The spelling of 6664766 in words is "six million, six hundred sixty-four thousand, seven hundred sixty-six".