664163848 has 16 divisors (see below), whose sum is σ = 1310850000. Its totient is φ = 314603856.

The previous prime is 664163833. The next prime is 664163861. The reversal of 664163848 is 848361466.

It is a super-2 number, since 2×664163848² = 882227233980334208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664163798 and 664163807.

It is an unprimeable number.

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, 2184598 + ... + 2184901.

It is an arithmetic number, because the mean of its divisors is an integer number (81928125).

Almost surely, 2^664163848 is an apocalyptic number.

It is an amenable number.

664163848 is a deficient number, since it is larger than the sum of its proper divisors (646686152).

664163848 is a wasteful number, since it uses less digits than its factorization.

664163848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369524 (or 4369520 counting only the distinct ones).

The product of its digits is 663552, while the sum is 46.

The square root of 664163848 is about 25771.3765251296. The cubic root of 664163848 is about 872.4858870797.

The spelling of 664163848 in words is "six hundred sixty-four million, one hundred sixty-three thousand, eight hundred forty-eight".