55666659 has 16 divisors (see below), whose sum is σ = 76557312. Its totient is φ = 35959488.

The previous prime is 55666657. The next prime is 55666679. The reversal of 55666659 is 95666655.

It is not a de Polignac number, because 55666659 - 2¹ = 55666657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55666657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12607 + ... + 16439.

It is an arithmetic number, because the mean of its divisors is an integer number (4784832).

Almost surely, 2^55666659 is an apocalyptic number.

55666659 is a deficient number, since it is larger than the sum of its proper divisors (20890653).

55666659 is a wasteful number, since it uses less digits than its factorization.

55666659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986.

The product of its digits is 1458000, while the sum is 48.

The square root of 55666659 is about 7461.0092480843. The cubic root of 55666659 is about 381.8256081992.

The spelling of 55666659 in words is "fifty-five million, six hundred sixty-six thousand, six hundred fifty-nine".