671776068 has 24 divisors (see below), whose sum is σ = 1621529280. Its totient is φ = 216203680.

The previous prime is 671776051. The next prime is 671776069. The reversal of 671776068 is 860677176.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (671776069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964848 + ... + 965543.

It is an arithmetic number, because the mean of its divisors is an integer number (67563720).

Almost surely, 2^671776068 is an apocalyptic number.

It is an amenable number.

671776068 is an abundant number, since it is smaller than the sum of its proper divisors (949753212).

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

671776068 is a wasteful number, since it uses less digits than its factorization.

671776068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930427 (or 1930425 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 671776068 is about 25918.6432515284. The cubic root of 671776068 is about 875.8065240653.

The spelling of 671776068 in words is "six hundred seventy-one million, seven hundred seventy-six thousand, sixty-eight".