66655000 has 40 divisors (see below), whose sum is σ = 156184380. Its totient is φ = 26660000.

The previous prime is 66654953. The next prime is 66655049. The reversal of 66655000 is 55666.

66655000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66655000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1666 + ... + 11665.

Almost surely, 2^66655000 is an apocalyptic number.

It is an amenable number.

66655000 is an abundant number, since it is smaller than the sum of its proper divisors (89529380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66655000 is a wasteful number, since it uses less digits than its factorization.

66655000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357 (or 13338 counting only the distinct ones).

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

The square root of 66655000 is about 8164.2513435097. The cubic root of 66655000 is about 405.4564786506.

The spelling of 66655000 in words is "sixty-six million, six hundred fifty-five thousand".