647749466 has 16 divisors (see below), whose sum is σ = 1195845504. Its totient is φ = 256252464.

The previous prime is 647749451. The next prime is 647749471. The reversal of 647749466 is 664947746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779350 + ... + 1779713.

It is an arithmetic number, because the mean of its divisors is an integer number (74740344).

Almost surely, 2^647749466 is an apocalyptic number.

647749466 is a deficient number, since it is larger than the sum of its proper divisors (548096038).

647749466 is a wasteful number, since it uses less digits than its factorization.

647749466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559085.

The product of its digits is 6096384, while the sum is 53.

The square root of 647749466 is about 25450.9226944722. The cubic root of 647749466 is about 865.2382054157.

The spelling of 647749466 in words is "six hundred forty-seven million, seven hundred forty-nine thousand, four hundred sixty-six".