66845732 has 12 divisors (see below), whose sum is σ = 117395376. Its totient is φ = 33304200.

The previous prime is 66845731. The next prime is 66845741. The reversal of 66845732 is 23754866.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66845732.

It is not an unprimeable number, because it can be changed into a prime (66845731) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28394 + ... + 30657.

It is an arithmetic number, because the mean of its divisors is an integer number (9782948).

Almost surely, 2^66845732 is an apocalyptic number.

It is an amenable number.

66845732 is a deficient number, since it is larger than the sum of its proper divisors (50549644).

66845732 is a wasteful number, since it uses less digits than its factorization.

66845732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59338 (or 59336 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 66845732 is about 8175.9239233251. The cubic root of 66845732 is about 405.8428456614.

The spelling of 66845732 in words is "sixty-six million, eight hundred forty-five thousand, seven hundred thirty-two".