66844036 has 18 divisors (see below), whose sum is σ = 136075758. Its totient is φ = 28647360.

The previous prime is 66844021. The next prime is 66844067. The reversal of 66844036 is 63044866.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 17056900 = 7056^2 + 4130^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66843986 and 66844004.

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 5 ways as a sum of consecutive naturals, for example, 170325 + ... + 170716.

Almost surely, 2^66844036 is an apocalyptic number.

It is an amenable number.

66844036 is an abundant number, since it is smaller than the sum of its proper divisors (69231722).

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

66844036 is a wasteful number, since it uses less digits than its factorization.

66844036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341059 (or 341050 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 66844036 is about 8175.8202035025. The cubic root of 66844036 is about 405.8394133042.

The spelling of 66844036 in words is "sixty-six million, eight hundred forty-four thousand, thirty-six".