66820184124 has 48 divisors (see below), whose sum is σ = 166368007680. Its totient is φ = 20812049280.

The previous prime is 66820184089. The next prime is 66820184129. The reversal of 66820184124 is 42148102866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66820184129) by changing a digit.

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, 1990692 + ... + 2023979.

It is an arithmetic number, because the mean of its divisors is an integer number (3466000160).

Almost surely, 2^66820184124 is an apocalyptic number.

It is an amenable number.

66820184124 is an abundant number, since it is smaller than the sum of its proper divisors (99547823556).

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

66820184124 is a wasteful number, since it uses less digits than its factorization.

66820184124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014770 (or 4014768 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 66820184124 in words is "sixty-six billion, eight hundred twenty million, one hundred eighty-four thousand, one hundred twenty-four".