7666668 has 36 divisors (see below), whose sum is σ = 19507488. Its totient is φ = 2538720.

The previous prime is 7666667. The next prime is 7666669. The reversal of 7666668 is 8666667.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7666667) and next prime (7666669).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (7666661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5613 + ... + 6843.

Almost surely, 2^7666668 is an apocalyptic number.

It is an amenable number.

7666668 is an abundant number, since it is smaller than the sum of its proper divisors (11840820).

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

7666668 is a wasteful number, since it uses less digits than its factorization.

7666668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414 (or 1409 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 7666668 is about 2768.8748617444. The cubic root of 7666668 is about 197.1827347542.

Subtracting 7666668 from its reverse (8666667), we obtain a palindrome (999999).

The spelling of 7666668 in words is "seven million, six hundred sixty-six thousand, six hundred sixty-eight".