6664726 has 4 divisors (see below), whose sum is σ = 9997092. Its totient is φ = 3332362.

The previous prime is 6664717. The next prime is 6664729. The reversal of 6664726 is 6274666.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666180 + ... + 1666183.

It is an arithmetic number, because the mean of its divisors is an integer number (2499273).

Almost surely, 2^6664726 is an apocalyptic number.

6664726 is a deficient number, since it is larger than the sum of its proper divisors (3332366).

6664726 is a wasteful number, since it uses less digits than its factorization.

6664726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332365.

The product of its digits is 72576, while the sum is 37.

The square root of 6664726 is about 2581.6130616341. The cubic root of 6664726 is about 188.1889416313.

The spelling of 6664726 in words is "six million, six hundred sixty-four thousand, seven hundred twenty-six".