647666314 has 8 divisors (see below), whose sum is σ = 971694468. Its totient is φ = 323768160.

The previous prime is 647666311. The next prime is 647666329. The reversal of 647666314 is 413666746.

It can be written as a sum of positive squares in 2 ways, for example, as 547326025 + 100340289 = 23395^2 + 10017^2 .

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

It is not an unprimeable number, because it can be changed into a prime (647666311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18907 + ... + 40654.

Almost surely, 2^647666314 is an apocalyptic number.

647666314 is a deficient number, since it is larger than the sum of its proper divisors (324028154).

647666314 is a wasteful number, since it uses less digits than its factorization.

647666314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65000.

The product of its digits is 435456, while the sum is 43.

The square root of 647666314 is about 25449.2890666910. The cubic root of 647666314 is about 865.2011801099.

The spelling of 647666314 in words is "six hundred forty-seven million, six hundred sixty-six thousand, three hundred fourteen".