6663768 has 16 divisors (see below), whose sum is σ = 16659480. Its totient is φ = 2221248.

The previous prime is 6663763. The next prime is 6663793. The reversal of 6663768 is 8673666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138805 + ... + 138852.

Almost surely, 2^6663768 is an apocalyptic number.

It is an amenable number.

6663768 is an abundant number, since it is smaller than the sum of its proper divisors (9995712).

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

6663768 is a wasteful number, since it uses less digits than its factorization.

6663768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277666 (or 277662 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 6663768 is about 2581.4275120561. The cubic root of 6663768 is about 188.1799243241.

The spelling of 6663768 in words is "six million, six hundred sixty-three thousand, seven hundred sixty-eight".