66006510055 has 32 divisors (see below), whose sum is σ = 83871590400. Its totient is φ = 49729946112.

The previous prime is 66006510043. The next prime is 66006510071. The reversal of 66006510055 is 55001560066.

It is a cyclic number.

It is not a de Polignac number, because 66006510055 - 2⁵ = 66006510023 is a prime.

It is a super-2 number, since 2×66006510055² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66006510055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11490514 + ... + 11496256.

It is an arithmetic number, because the mean of its divisors is an integer number (2620987200).

Almost surely, 2^66006510055 is an apocalyptic number.

66006510055 is a deficient number, since it is larger than the sum of its proper divisors (17865080345).

66006510055 is a wasteful number, since it uses less digits than its factorization.

66006510055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6463.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 66006510055 in words is "sixty-six billion, six million, five hundred ten thousand, fifty-five".