7216660 has 24 divisors (see below), whose sum is σ = 16533216. Its totient is φ = 2624160.

The previous prime is 7216633. The next prime is 7216661. The reversal of 7216660 is 666127.

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 7 ways as a sum of consecutive naturals, for example, 16182 + ... + 16621.

It is an arithmetic number, because the mean of its divisors is an integer number (688884).

Almost surely, 2^7216660 is an apocalyptic number.

It is an amenable number.

7216660 is an abundant number, since it is smaller than the sum of its proper divisors (9316556).

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

7216660 is a wasteful number, since it uses less digits than its factorization.

7216660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32823 (or 32821 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7216660 is about 2686.3841869695. The cubic root of 7216660 is about 193.2466978723.

It can be divided in two parts, 721 and 6660, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 7216660 in words is "seven million, two hundred sixteen thousand, six hundred sixty".