646775334 has 16 divisors (see below), whose sum is σ = 1437278640. Its totient is φ = 215591760.

The previous prime is 646775323. The next prime is 646775359. The reversal of 646775334 is 433577646.

646775334 is a `hidden beast` number, since 6 + 46 + 77 + 533 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 646775334.

It is a congruent number.

It is an unprimeable number.

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, 5988607 + ... + 5988714.

It is an arithmetic number, because the mean of its divisors is an integer number (89829915).

Almost surely, 2^646775334 is an apocalyptic number.

646775334 is an abundant number, since it is smaller than the sum of its proper divisors (790503306).

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

646775334 is a wasteful number, since it uses less digits than its factorization.

646775334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11977332 (or 11977326 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 45.

The square root of 646775334 is about 25431.7780345771. The cubic root of 646775334 is about 864.8042520963.

The spelling of 646775334 in words is "six hundred forty-six million, seven hundred seventy-five thousand, three hundred thirty-four".