55666559995905 has 8 divisors (see below), whose sum is σ = 89066495993472. Its totient is φ = 29688831997808.

The previous prime is 55666559995883. The next prime is 55666559995933. The reversal of 55666559995905 is 50959995566655.

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 55666559995905 - 2⁷ = 55666559995777 is a prime.

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, 1855551999849 + ... + 1855551999878.

It is an arithmetic number, because the mean of its divisors is an integer number (11133311999184).

Almost surely, 2^{55666559995905} is an apocalyptic number.

It is an amenable number.

55666559995905 is a deficient number, since it is larger than the sum of its proper divisors (33399935997567).

55666559995905 is a wasteful number, since it uses less digits than its factorization.

55666559995905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711103999735.

The product of its (nonzero) digits is 22143375000, while the sum is 84.

The spelling of 55666559995905 in words is "fifty-five trillion, six hundred sixty-six billion, five hundred fifty-nine million, nine hundred ninety-five thousand, nine hundred five".