673656648 has 32 divisors (see below), whose sum is σ = 1924733760. Its totient is φ = 192473280.

The previous prime is 673656601. The next prime is 673656649. The reversal of 673656648 is 846656376.

It is a self number, because there is not a number n which added to its sum of digits gives 673656648.

It is not an unprimeable number, because it can be changed into a prime (673656649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2004763 + ... + 2005098.

It is an arithmetic number, because the mean of its divisors is an integer number (60147930).

Almost surely, 2^673656648 is an apocalyptic number.

It is an amenable number.

673656648 is an abundant number, since it is smaller than the sum of its proper divisors (1251077112).

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

673656648 is a wasteful number, since it uses less digits than its factorization.

673656648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009877 (or 4009873 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The square root of 673656648 is about 25954.8964166687. The cubic root of 673656648 is about 876.6230112827.

The spelling of 673656648 in words is "six hundred seventy-three million, six hundred fifty-six thousand, six hundred forty-eight".