7216664 has 64 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 2724480.

The previous prime is 7216663. The next prime is 7216667. The reversal of 7216664 is 4666127.

It is a self number, because there is not a number n which added to its sum of digits gives 7216664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216661) 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 in 15 ways as a sum of consecutive naturals, for example, 16529 + ... + 16959.

It is an arithmetic number, because the mean of its divisors is an integer number (272160).

Almost surely, 2^7216664 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 7216664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8709120).

7216664 is an abundant number, since it is smaller than the sum of its proper divisors (10201576).

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

7216664 is a wasteful number, since it uses less digits than its factorization.

7216664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 476 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 7216664 is about 2686.3849314646. The cubic root of 7216664 is about 193.2467335761.

The spelling of 7216664 in words is "seven million, two hundred sixteen thousand, six hundred sixty-four".