7664666 has 16 divisors (see below), whose sum is σ = 11926656. Its totient is φ = 3691776.

The previous prime is 7664653. The next prime is 7664669. The reversal of 7664666 is 6664667.

It is not an unprimeable number, because it can be changed into a prime (7664669) 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, 5690 + ... + 6906.

It is an arithmetic number, because the mean of its divisors is an integer number (745416).

Almost surely, 2^7664666 is an apocalyptic number.

7664666 is a deficient number, since it is larger than the sum of its proper divisors (4261990).

7664666 is a wasteful number, since it uses less digits than its factorization.

7664666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333.

The product of its digits is 217728, while the sum is 41.

The square root of 7664666 is about 2768.5133194550. The cubic root of 7664666 is about 197.1655697920.

Subtracting from 7664666 its reverse (6664667), we obtain a palindrome (999999).

The spelling of 7664666 in words is "seven million, six hundred sixty-four thousand, six hundred sixty-six".