671680137 has 8 divisors (see below), whose sum is σ = 900577440. Its totient is φ = 445284800.

The previous prime is 671680133. The next prime is 671680151. The reversal of 671680137 is 731086176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671680137 - 2² = 671680133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671680095 and 671680104.

It is not an unprimeable number, because it can be changed into a prime (671680133) 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, 624864 + ... + 625937.

It is an arithmetic number, because the mean of its divisors is an integer number (112572180).

Almost surely, 2^671680137 is an apocalyptic number.

It is an amenable number.

671680137 is a deficient number, since it is larger than the sum of its proper divisors (228897303).

671680137 is a wasteful number, since it uses less digits than its factorization.

671680137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250983.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 671680137 is about 25916.7925677542. The cubic root of 671680137 is about 875.7648330916.

The spelling of 671680137 in words is "six hundred seventy-one million, six hundred eighty thousand, one hundred thirty-seven".