671568780 has 48 divisors (see below), whose sum is σ = 1881905760. Its totient is φ = 178940928.

The previous prime is 671568767. The next prime is 671568787. The reversal of 671568780 is 87865176.

It is not an unprimeable number, because it can be changed into a prime (671568787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85582 + ... + 93098.

It is an arithmetic number, because the mean of its divisors is an integer number (39206370).

Almost surely, 2^671568780 is an apocalyptic number.

671568780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671568780 is an abundant number, since it is smaller than the sum of its proper divisors (1210336980).

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

671568780 is a wasteful number, since it uses less digits than its factorization.

671568780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018 (or 9016 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 671568780 is about 25914.6441225806. The cubic root of 671568780 is about 875.7164331023.

The spelling of 671568780 in words is "six hundred seventy-one million, five hundred sixty-eight thousand, seven hundred eighty".