671076640 has 48 divisors (see below), whose sum is σ = 1707379128. Its totient is φ = 247781376.

The previous prime is 671076631. The next prime is 671076647. The reversal of 671076640 is 46670176.

It can be written as a sum of positive squares in 4 ways, for example, as 622801936 + 48274704 = 24956^2 + 6948^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 671076640.

It is not an unprimeable number, because it can be changed into a prime (671076647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159237 + ... + 163396.

Almost surely, 2^671076640 is an apocalyptic number.

It is an amenable number.

671076640 is an abundant number, since it is smaller than the sum of its proper divisors (1036302488).

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

671076640 is a wasteful number, since it uses less digits than its factorization.

671076640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322661 (or 322653 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 671076640 is about 25905.1469789307. The cubic root of 671076640 is about 875.5024662349.

The spelling of 671076640 in words is "six hundred seventy-one million, seventy-six thousand, six hundred forty".