66664246 has 8 divisors (see below), whose sum is σ = 109086984. Its totient is φ = 30301920.

The previous prime is 66664231. The next prime is 66664271. The reversal of 66664246 is 64246666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66664199 and 66664208.

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 3 ways as a sum of consecutive naturals, for example, 1515075 + ... + 1515118.

It is an arithmetic number, because the mean of its divisors is an integer number (13635873).

Almost surely, 2^66664246 is an apocalyptic number.

66664246 is a deficient number, since it is larger than the sum of its proper divisors (42422738).

66664246 is a wasteful number, since it uses less digits than its factorization.

66664246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030206.

The product of its digits is 248832, while the sum is 40.

The square root of 66664246 is about 8164.8175729774. The cubic root of 66664246 is about 405.4752253176.

The spelling of 66664246 in words is "sixty-six million, six hundred sixty-four thousand, two hundred forty-six".