55115666 has 8 divisors (see below), whose sum is σ = 87536700. Its totient is φ = 25936768.

The previous prime is 55115651. The next prime is 55115677. The reversal of 55115666 is 66651155.

It can be written as a sum of positive squares in 2 ways, for example, as 44689225 + 10426441 = 6685^2 + 3229^2 .

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

It is a Curzon number.

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, 810491 + ... + 810558.

Almost surely, 2^55115666 is an apocalyptic number.

55115666 is a deficient number, since it is larger than the sum of its proper divisors (32421034).

55115666 is a wasteful number, since it uses less digits than its factorization.

55115666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621068.

The product of its digits is 27000, while the sum is 35.

The square root of 55115666 is about 7423.9925915911. The cubic root of 55115666 is about 380.5616486858.

The spelling of 55115666 in words is "fifty-five million, one hundred fifteen thousand, six hundred sixty-six".