6660566 has 24 divisors (see below), whose sum is σ = 11634840. Its totient is φ = 2847680.

The previous prime is 6660557. The next prime is 6660587. The reversal of 6660566 is 6650666.

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, 3305 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (484785).

Almost surely, 2^6660566 is an apocalyptic number.

6660566 is a deficient number, since it is larger than the sum of its proper divisors (4974274).

6660566 is a wasteful number, since it uses less digits than its factorization.

6660566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 6660566 is about 2580.8072380556. The cubic root of 6660566 is about 188.1497787842.

The spelling of 6660566 in words is "six million, six hundred sixty thousand, five hundred sixty-six".