66184980 has 48 divisors (see below), whose sum is σ = 195074880. Its totient is φ = 16720128.

The previous prime is 66184913. The next prime is 66184981. The reversal of 66184980 is 8948166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66184981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27889 + ... + 30168.

It is an arithmetic number, because the mean of its divisors is an integer number (4064060).

Almost surely, 2^66184980 is an apocalyptic number.

66184980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66184980 is an abundant number, since it is smaller than the sum of its proper divisors (128889900).

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

66184980 is a wasteful number, since it uses less digits than its factorization.

66184980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58088 (or 58086 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 66184980 is about 8135.4151707212. The cubic root of 66184980 is about 404.5011996748.

The spelling of 66184980 in words is "sixty-six million, one hundred eighty-four thousand, nine hundred eighty".