671688376 has 8 divisors (see below), whose sum is σ = 1259415720. Its totient is φ = 335844184.

The previous prime is 671688349. The next prime is 671688379. The reversal of 671688376 is 673886176.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671688379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41980516 + ... + 41980531.

It is an arithmetic number, because the mean of its divisors is an integer number (157426965).

Almost surely, 2^671688376 is an apocalyptic number.

It is an amenable number.

671688376 is a deficient number, since it is larger than the sum of its proper divisors (587727344).

671688376 is a wasteful number, since it uses less digits than its factorization.

671688376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83961053 (or 83961049 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 671688376 is about 25916.9515182631. The cubic root of 671688376 is about 875.7684138619.

The spelling of 671688376 in words is "six hundred seventy-one million, six hundred eighty-eight thousand, three hundred seventy-six".