55666705 has 8 divisors (see below), whose sum is σ = 67226472. Its totient is φ = 44249088.

The previous prime is 55666697. The next prime is 55666711. The reversal of 55666705 is 50766655.

It can be written as a sum of positive squares in 4 ways, for example, as 3017169 + 52649536 = 1737^2 + 7256^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55666705 - 2³ = 55666697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34672 + ... + 36241.

It is an arithmetic number, because the mean of its divisors is an integer number (8403309).

Almost surely, 2^55666705 is an apocalyptic number.

It is an amenable number.

55666705 is a deficient number, since it is larger than the sum of its proper divisors (11559767).

55666705 is a wasteful number, since it uses less digits than its factorization.

55666705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71075.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 55666705 is about 7461.0123307766. The cubic root of 55666705 is about 381.8257133727.

The spelling of 55666705 in words is "fifty-five million, six hundred sixty-six thousand, seven hundred five".