66656006553 has 16 divisors (see below), whose sum is σ = 90595895040. Its totient is φ = 43577549184.

The previous prime is 66656006551. The next prime is 66656006569. The reversal of 66656006553 is 35560065666.

It is not a de Polignac number, because 66656006553 - 2¹ = 66656006551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66656006551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226413 + ... + 429621.

It is an arithmetic number, because the mean of its divisors is an integer number (5662243440).

Almost surely, 2^66656006553 is an apocalyptic number.

It is an amenable number.

66656006553 is a deficient number, since it is larger than the sum of its proper divisors (23939888487).

66656006553 is a wasteful number, since it uses less digits than its factorization.

66656006553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205328.

The product of its (nonzero) digits is 2916000, while the sum is 48.

The spelling of 66656006553 in words is "sixty-six billion, six hundred fifty-six million, six thousand, five hundred fifty-three".