66881732 has 12 divisors (see below), whose sum is σ = 118453776. Its totient is φ = 33037800.

The previous prime is 66881719. The next prime is 66881747. The reversal of 66881732 is 23718866.

It is a happy number.

66881732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66881732.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100394 + ... + 101057.

It is an arithmetic number, because the mean of its divisors is an integer number (9871148).

Almost surely, 2^66881732 is an apocalyptic number.

It is an amenable number.

66881732 is a deficient number, since it is larger than the sum of its proper divisors (51572044).

66881732 is a wasteful number, since it uses less digits than its factorization.

66881732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201538 (or 201536 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 66881732 is about 8178.1252130302. The cubic root of 66881732 is about 405.9156886088.

The spelling of 66881732 in words is "sixty-six million, eight hundred eighty-one thousand, seven hundred thirty-two".