647098664 has 16 divisors (see below), whose sum is σ = 1215450900. Its totient is φ = 322978432.

The previous prime is 647098651. The next prime is 647098667. The reversal of 647098664 is 466890746.

It can be written as a sum of positive squares in 2 ways, for example, as 471324100 + 175774564 = 21710^2 + 13258^2 .

It is not an unprimeable number, because it can be changed into a prime (647098667) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 66527 + ... + 75630.

Almost surely, 2^647098664 is an apocalyptic number.

It is an amenable number.

647098664 is a deficient number, since it is larger than the sum of its proper divisors (568352236).

647098664 is a wasteful number, since it uses less digits than its factorization.

647098664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142732 (or 142728 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 647098664 is about 25438.1340510659. The cubic root of 647098664 is about 864.9483364290.

The spelling of 647098664 in words is "six hundred forty-seven million, ninety-eight thousand, six hundred sixty-four".