5656666 has 8 divisors (see below), whose sum is σ = 8853984. Its totient is φ = 2705340.

The previous prime is 5656649. The next prime is 5656691. The reversal of 5656666 is 6666565.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61440 + ... + 61531.

It is an arithmetic number, because the mean of its divisors is an integer number (1106748).

Almost surely, 2^5656666 is an apocalyptic number.

5656666 is a deficient number, since it is larger than the sum of its proper divisors (3197318).

5656666 is a wasteful number, since it uses less digits than its factorization.

5656666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122996.

The product of its digits is 194400, while the sum is 40.

The square root of 5656666 is about 2378.3746550954. The cubic root of 5656666 is about 178.1777671103.

The spelling of 5656666 in words is "five million, six hundred fifty-six thousand, six hundred sixty-six".