66141984 has 24 divisors (see below), whose sum is σ = 173622960. Its totient is φ = 22047296.

The previous prime is 66141947. The next prime is 66141991. The reversal of 66141984 is 48914166.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344394 + ... + 344585.

It is an arithmetic number, because the mean of its divisors is an integer number (7234290).

Almost surely, 2^66141984 is an apocalyptic number.

It is an amenable number.

66141984 is an abundant number, since it is smaller than the sum of its proper divisors (107480976).

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

66141984 is a wasteful number, since it uses less digits than its factorization.

66141984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688992 (or 688984 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 66141984 is about 8132.7722210818. The cubic root of 66141984 is about 404.4135881499.

The spelling of 66141984 in words is "sixty-six million, one hundred forty-one thousand, nine hundred eighty-four".