6663886 has 4 divisors (see below), whose sum is σ = 9995832. Its totient is φ = 3331942.

The previous prime is 6663869. The next prime is 6663893. The reversal of 6663886 is 6883666.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665970 + ... + 1665973.

It is an arithmetic number, because the mean of its divisors is an integer number (2498958).

Almost surely, 2^6663886 is an apocalyptic number.

6663886 is a deficient number, since it is larger than the sum of its proper divisors (3331946).

6663886 is a wasteful number, since it uses less digits than its factorization.

6663886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331945.

The product of its digits is 248832, while the sum is 43.

The square root of 6663886 is about 2581.4503675260. The cubic root of 6663886 is about 188.1810350621.

The spelling of 6663886 in words is "six million, six hundred sixty-three thousand, eight hundred eighty-six".