671733688 has 8 divisors (see below), whose sum is σ = 1259500680. Its totient is φ = 335866840.

The previous prime is 671733683. The next prime is 671733697. The reversal of 671733688 is 886337176.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×671733688² = 902452295188162688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671733683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41983348 + ... + 41983363.

It is an arithmetic number, because the mean of its divisors is an integer number (157437585).

Almost surely, 2^671733688 is an apocalyptic number.

It is an amenable number.

671733688 is a deficient number, since it is larger than the sum of its proper divisors (587766992).

671733688 is a wasteful number, since it uses less digits than its factorization.

671733688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83966717 (or 83966713 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 49.

The square root of 671733688 is about 25917.8256804077. The cubic root of 671733688 is about 875.7881064890.

The spelling of 671733688 in words is "six hundred seventy-one million, seven hundred thirty-three thousand, six hundred eighty-eight".