66941982 has 24 divisors (see below), whose sum is σ = 146400696. Its totient is φ = 22104816.

The previous prime is 66941969. The next prime is 66941999. The reversal of 66941982 is 28914966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15453 + ... + 19304.

It is an arithmetic number, because the mean of its divisors is an integer number (6100029).

Almost surely, 2^66941982 is an apocalyptic number.

66941982 is an abundant number, since it is smaller than the sum of its proper divisors (79458714).

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

66941982 is a wasteful number, since it uses less digits than its factorization.

66941982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34872 (or 34869 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 66941982 is about 8181.8079909027. The cubic root of 66941982 is about 406.0375409162.

The spelling of 66941982 in words is "sixty-six million, nine hundred forty-one thousand, nine hundred eighty-two".