671426560 has 384 divisors, whose sum is σ = 2122848000. Its totient is φ = 198180864.

The previous prime is 671426527. The next prime is 671426633. The reversal of 671426560 is 65624176.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23152626 + ... + 23152654.

It is an arithmetic number, because the mean of its divisors is an integer number (5528250).

Almost surely, 2^671426560 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 671426560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061424000).

671426560 is an abundant number, since it is smaller than the sum of its proper divisors (1451421440).

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

671426560 is a wasteful number, since it uses less digits than its factorization.

671426560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 671426560 is about 25911.8999689332. The cubic root of 671426560 is about 875.6546110980.

The spelling of 671426560 in words is "six hundred seventy-one million, four hundred twenty-six thousand, five hundred sixty".