673557646 has 16 divisors (see below), whose sum is σ = 1104278400. Its totient is φ = 306743040.

The previous prime is 673557613. The next prime is 673557649. The reversal of 673557646 is 646755376.

It is a super-2 number, since 2×673557646² = 907359804970122632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 673557646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673557649) 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, 318471 + ... + 320578.

It is an arithmetic number, because the mean of its divisors is an integer number (69017400).

Almost surely, 2^673557646 is an apocalyptic number.

673557646 is a deficient number, since it is larger than the sum of its proper divisors (430720754).

673557646 is a wasteful number, since it uses less digits than its factorization.

673557646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639099.

The product of its digits is 3175200, while the sum is 49.

The square root of 673557646 is about 25952.9891534675. The cubic root of 673557646 is about 876.5800657241.

The spelling of 673557646 in words is "six hundred seventy-three million, five hundred fifty-seven thousand, six hundred forty-six".