6664572 has 48 divisors (see below), whose sum is σ = 18036480. Its totient is φ = 2124144.

The previous prime is 6664571. The next prime is 6664607. The reversal of 6664572 is 2754666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664571) 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 in 15 ways as a sum of consecutive naturals, for example, 1143 + ... + 3825.

It is an arithmetic number, because the mean of its divisors is an integer number (375760).

Almost surely, 2^6664572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6664572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9018240).

6664572 is an abundant number, since it is smaller than the sum of its proper divisors (11371908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6664572 is a wasteful number, since it uses less digits than its factorization.

6664572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719 (or 2711 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 6664572 is about 2581.5832351485. The cubic root of 6664572 is about 188.1874921434.

The spelling of 6664572 in words is "six million, six hundred sixty-four thousand, five hundred seventy-two".