55009666 has 8 divisors (see below), whose sum is σ = 82678140. Its totient is φ = 27450288.

The previous prime is 55009631. The next prime is 55009679. The reversal of 55009666 is 66690055.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44609041 + 10400625 = 6679^2 + 3225^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26001 + ... + 28036.

Almost surely, 2^55009666 is an apocalyptic number.

55009666 is a deficient number, since it is larger than the sum of its proper divisors (27668474).

55009666 is a wasteful number, since it uses less digits than its factorization.

55009666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54548.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 55009666 is about 7416.8501400527. The cubic root of 55009666 is about 380.3175231581.

The spelling of 55009666 in words is "fifty-five million, nine thousand, six hundred sixty-six".