7321668 has 24 divisors (see below), whose sum is σ = 17131968. Its totient is φ = 2433696.

The previous prime is 7321663. The next prime is 7321687. The reversal of 7321668 is 8661237.

7321668 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7321661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5430 + ... + 6642.

It is an arithmetic number, because the mean of its divisors is an integer number (713832).

Almost surely, 2^7321668 is an apocalyptic number.

It is an amenable number.

7321668 is an abundant number, since it is smaller than the sum of its proper divisors (9810300).

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

7321668 is a wasteful number, since it uses less digits than its factorization.

7321668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723 (or 1721 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 7321668 is about 2705.8580894053. The cubic root of 7321668 is about 194.1794845826.

The spelling of 7321668 in words is "seven million, three hundred twenty-one thousand, six hundred sixty-eight".