673919664 has 240 divisors, whose sum is σ = 2089866240. Its totient is φ = 186278400.

The previous prime is 673919657. The next prime is 673919681. The reversal of 673919664 is 466919376.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3420814 + ... + 3421010.

It is an arithmetic number, because the mean of its divisors is an integer number (8707776).

Almost surely, 2^673919664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673919664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044933120).

673919664 is an abundant number, since it is smaller than the sum of its proper divisors (1415946576).

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

673919664 is a wasteful number, since it uses less digits than its factorization.

673919664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 263 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 51.

The square root of 673919664 is about 25959.9627118376. The cubic root of 673919664 is about 876.7370831809.

The spelling of 673919664 in words is "six hundred seventy-three million, nine hundred nineteen thousand, six hundred sixty-four".