66206344 has 8 divisors (see below), whose sum is σ = 124136910. Its totient is φ = 33103168.

The previous prime is 66206339. The next prime is 66206407. The reversal of 66206344 is 44360266.

66206344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 46758244 + 19448100 = 6838^2 + 4410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 4137889 + ... + 4137904.

Almost surely, 2^66206344 is an apocalyptic number.

It is an amenable number.

66206344 is a deficient number, since it is larger than the sum of its proper divisors (57930566).

66206344 is a wasteful number, since it uses less digits than its factorization.

66206344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275799 (or 8275795 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 66206344 is about 8136.7280893489. The cubic root of 66206344 is about 404.5447182796.

The spelling of 66206344 in words is "sixty-six million, two hundred six thousand, three hundred forty-four".