671609796 has 96 divisors (see below), whose sum is σ = 1938048000. Its totient is φ = 177966720.

The previous prime is 671609779. The next prime is 671609801. The reversal of 671609796 is 697906176.

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, 22305 + ... + 42903.

It is an arithmetic number, because the mean of its divisors is an integer number (20188000).

Almost surely, 2^671609796 is an apocalyptic number.

671609796 is a gapful number since it is divisible by the number (66) 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 671609796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969024000).

671609796 is an abundant number, since it is smaller than the sum of its proper divisors (1266438204).

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

671609796 is a wasteful number, since it uses less digits than its factorization.

671609796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20649 (or 20647 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 51.

The square root of 671609796 is about 25915.4354777225. The cubic root of 671609796 is about 875.7342608389.

The spelling of 671609796 in words is "six hundred seventy-one million, six hundred nine thousand, seven hundred ninety-six".