66234543828 has 24 divisors (see below), whose sum is σ = 159532665600. Its totient is φ = 21365981760.

The previous prime is 66234543763. The next prime is 66234543857. The reversal of 66234543828 is 82834543266.

It is a super-2 number, since 2×66234543828² (a number of 22 digits) 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89024553 + ... + 89025296.

It is an arithmetic number, because the mean of its divisors is an integer number (6647194400).

Almost surely, 2^66234543828 is an apocalyptic number.

It is an amenable number.

66234543828 is an abundant number, since it is smaller than the sum of its proper divisors (93298121772).

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

66234543828 is a wasteful number, since it uses less digits than its factorization.

66234543828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178049887 (or 178049885 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 51.

The spelling of 66234543828 in words is "sixty-six billion, two hundred thirty-four million, five hundred forty-three thousand, eight hundred twenty-eight".