666000055 has 8 divisors (see below), whose sum is σ = 913371552. Its totient is φ = 456685728.

The previous prime is 666000047. The next prime is 666000061. The reversal of 666000055 is 550000666.

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 666000055 - 2³ = 666000047 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 665999987 and 666000032.

It is a congruent 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, 9514252 + ... + 9514321.

It is an arithmetic number, because the mean of its divisors is an integer number (114171444).

Almost surely, 2^666000055 is an apocalyptic number.

666000055 is a deficient number, since it is larger than the sum of its proper divisors (247371497).

666000055 is a wasteful number, since it uses less digits than its factorization.

666000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19028585.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 666000055 is about 25806.9768667312. The cubic root of 666000055 is about 873.2891981691.

The spelling of 666000055 in words is "six hundred sixty-six million, fifty-five", and thus it is an aban number.