671716800 has 420 divisors, whose sum is σ = 2538136656. Its totient is φ = 174182400.

The previous prime is 671716783. The next prime is 671716813. The reversal of 671716800 is 8617176.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 9201564 + ... + 9201636.

Almost surely, 2^671716800 is an apocalyptic number.

671716800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671716800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269068328).

671716800 is an abundant number, since it is smaller than the sum of its proper divisors (1866419856).

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

671716800 is a wasteful number, since it uses less digits than its factorization.

671716800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 671716800 is about 25917.4998794251. The cubic root of 671716800 is about 875.7807670559.

The spelling of 671716800 in words is "six hundred seventy-one million, seven hundred sixteen thousand, eight hundred".