66885055 has 16 divisors (see below), whose sum is σ = 86430240. Its totient is φ = 49503232.

The previous prime is 66885047. The next prime is 66885083. The reversal of 66885055 is 55058866.

It is a cyclic number.

It is not a de Polignac number, because 66885055 - 2³ = 66885047 is a prime.

It is a super-2 number, since 2×66885055² = 8947221164706050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1654 + ... + 11683.

It is an arithmetic number, because the mean of its divisors is an integer number (5401890).

Almost surely, 2^66885055 is an apocalyptic number.

66885055 is a deficient number, since it is larger than the sum of its proper divisors (19545185).

66885055 is a wasteful number, since it uses less digits than its factorization.

66885055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13418.

The product of its (nonzero) digits is 288000, while the sum is 43.

The square root of 66885055 is about 8178.3283744296. The cubic root of 66885055 is about 405.9224110996.

The spelling of 66885055 in words is "sixty-six million, eight hundred eighty-five thousand, fifty-five".