647266885 has 8 divisors (see below), whose sum is σ = 787660416. Its totient is φ = 510520080.

The previous prime is 647266847. The next prime is 647266889. The reversal of 647266885 is 588662746.

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

It is not a de Polignac number, because 647266885 - 2¹⁵ = 647234117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647266889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911289 + ... + 911998.

It is an arithmetic number, because the mean of its divisors is an integer number (98457552).

Almost surely, 2^647266885 is an apocalyptic number.

It is an amenable number.

647266885 is a deficient number, since it is larger than the sum of its proper divisors (140393531).

647266885 is a wasteful number, since it uses less digits than its factorization.

647266885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823363.

The product of its digits is 3870720, while the sum is 52.

The square root of 647266885 is about 25441.4403090706. The cubic root of 647266885 is about 865.0232811402.

The spelling of 647266885 in words is "six hundred forty-seven million, two hundred sixty-six thousand, eight hundred eighty-five".