660226646 has 4 divisors (see below), whose sum is σ = 990339972. Its totient is φ = 330113322.

The previous prime is 660226591. The next prime is 660226663. The reversal of 660226646 is 646622066.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165056660 + ... + 165056663.

It is an arithmetic number, because the mean of its divisors is an integer number (247584993).

Almost surely, 2^660226646 is an apocalyptic number.

660226646 is a deficient number, since it is larger than the sum of its proper divisors (330113326).

660226646 is a wasteful number, since it uses less digits than its factorization.

660226646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330113325.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 660226646 is about 25694.8758704922. The cubic root of 660226646 is about 870.7584199980.

The spelling of 660226646 in words is "six hundred sixty million, two hundred twenty-six thousand, six hundred forty-six".