647193066 has 64 divisors (see below), whose sum is σ = 1439424000. Its totient is φ = 192747456.

The previous prime is 647193047. The next prime is 647193073. The reversal of 647193066 is 660391746.

647193066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307285 + ... + 309383.

It is an arithmetic number, because the mean of its divisors is an integer number (22491000).

Almost surely, 2^647193066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647193066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719712000).

647193066 is an abundant number, since it is smaller than the sum of its proper divisors (792230934).

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

647193066 is a wasteful number, since it uses less digits than its factorization.

647193066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 647193066 is about 25439.9895047148. The cubic root of 647193066 is about 864.9903953849.

The spelling of 647193066 in words is "six hundred forty-seven million, one hundred ninety-three thousand, sixty-six".