66567535551 has 24 divisors (see below), whose sum is σ = 104902502016. Its totient is φ = 40340805840.

The previous prime is 66567535547. The next prime is 66567535591. The reversal of 66567535551 is 15553576566.

66567535551 is a `hidden beast` number, since 6 + 6 + 56 + 7 + 5 + 35 + 551 = 666.

It is not a de Polignac number, because 66567535551 - 2² = 66567535547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66567535501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2157036 + ... + 2187678.

It is an arithmetic number, because the mean of its divisors is an integer number (4370937584).

Almost surely, 2^66567535551 is an apocalyptic number.

66567535551 is a deficient number, since it is larger than the sum of its proper divisors (38334966465).

66567535551 is a wasteful number, since it uses less digits than its factorization.

66567535551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52603 (or 52600 counting only the distinct ones).

The product of its digits is 14175000, while the sum is 54.

The spelling of 66567535551 in words is "sixty-six billion, five hundred sixty-seven million, five hundred thirty-five thousand, five hundred fifty-one".