6766664 has 8 divisors (see below), whose sum is σ = 12687510. Its totient is φ = 3383328.

The previous prime is 6766631. The next prime is 6766667. The reversal of 6766664 is 4666676.

It can be written as a sum of positive squares in only one way, i.e., 6708100 + 58564 = 2590^2 + 242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6766667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422909 + ... + 422924.

Almost surely, 2^6766664 is an apocalyptic number.

It is an amenable number.

6766664 is a deficient number, since it is larger than the sum of its proper divisors (5920846).

6766664 is a wasteful number, since it uses less digits than its factorization.

6766664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845839 (or 845835 counting only the distinct ones).

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

The square root of 6766664 is about 2601.2812227823. The cubic root of 6766664 is about 189.1435506005.

The spelling of 6766664 in words is "six million, seven hundred sixty-six thousand, six hundred sixty-four".