766668 has 24 divisors (see below), whose sum is σ = 2044672. Its totient is φ = 219024.

The previous prime is 766651. The next prime is 766679. The reversal of 766668 is 866667.

It is an Ulam number.

It is an unprimeable number.

766668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 4480 + ... + 4647.

2⁷⁶⁶⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

766668 is an abundant number, since it is smaller than the sum of its proper divisors (1278004).

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

766668 is a wasteful number, since it uses less digits than its factorization.

766668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141 (or 9139 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 766668 is about 875.5957971576. The cubic root of 766668 is about 91.5241657333.

Subtracting 766668 from its reverse (866667), we obtain a palindrome (99999).

The spelling of 766668 in words is "seven hundred sixty-six thousand, six hundred sixty-eight".