6466865920 has 72 divisors (see below), whose sum is σ = 15908934384. Its totient is φ = 2516815872.

The previous prime is 6466865857. The next prime is 6466865941. The reversal of 6466865920 is 295686646.

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, 20914 + ... + 115633.

It is an arithmetic number, because the mean of its divisors is an integer number (220957422).

Almost surely, 2^6466865920 is an apocalyptic number.

It is an amenable number.

6466865920 is an abundant number, since it is smaller than the sum of its proper divisors (9442068464).

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

6466865920 is a wasteful number, since it uses less digits than its factorization.

6466865920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136605 (or 136591 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 52.

The square root of 6466865920 is about 80416.8261000147. The cubic root of 6466865920 is about 1863.0790639444.

The spelling of 6466865920 in words is "six billion, four hundred sixty-six million, eight hundred sixty-five thousand, nine hundred twenty".