6665766 has 24 divisors (see below), whose sum is σ = 13817544. Its totient is φ = 2143680.

The previous prime is 6665741. The next prime is 6665773. The reversal of 6665766 is 6675666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4386 + ... + 5706.

It is an arithmetic number, because the mean of its divisors is an integer number (575731).

Almost surely, 2^6665766 is an apocalyptic number.

6665766 is an abundant number, since it is smaller than the sum of its proper divisors (7151778).

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

6665766 is a wasteful number, since it uses less digits than its factorization.

6665766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1355 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 6665766 is about 2581.8144782304. The cubic root of 6665766 is about 188.1987297967.

The spelling of 6665766 in words is "six million, six hundred sixty-five thousand, seven hundred sixty-six".