6550666 has 8 divisors (see below), whose sum is σ = 9855360. Its totient is φ = 3265548.

The previous prime is 6550651. The next prime is 6550669. The reversal of 6550666 is 6660556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6550666² = 85822450087112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6550669) 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, 4026 + ... + 5413.

It is an arithmetic number, because the mean of its divisors is an integer number (1231920).

Almost surely, 2^6550666 is an apocalyptic number.

6550666 is a deficient number, since it is larger than the sum of its proper divisors (3304694).

6550666 is a wasteful number, since it uses less digits than its factorization.

6550666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9788.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 6550666 is about 2559.4268889734. The cubic root of 6550666 is about 187.1092044233.

The spelling of 6550666 in words is "six million, five hundred fifty thousand, six hundred sixty-six".