55566905 has 8 divisors (see below), whose sum is σ = 66724992. Its totient is φ = 44423728.

The previous prime is 55566869. The next prime is 55566983. The reversal of 55566905 is 50966555.

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 55566905 - 2²⁰ = 54518329 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, 7622 + ... + 13008.

It is an arithmetic number, because the mean of its divisors is an integer number (8340624).

Almost surely, 2^55566905 is an apocalyptic number.

It is an amenable number.

55566905 is a deficient number, since it is larger than the sum of its proper divisors (11158087).

55566905 is a wasteful number, since it uses less digits than its factorization.

55566905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455.

The product of its (nonzero) digits is 202500, while the sum is 41.

The square root of 55566905 is about 7454.3212299981. The cubic root of 55566905 is about 381.5973961566.

The spelling of 55566905 in words is "fifty-five million, five hundred sixty-six thousand, nine hundred five".