671085173207 has 4 divisors (see below), whose sum is σ = 671170964640. Its totient is φ = 670999381776.

The previous prime is 671085173093. The next prime is 671085173233. The reversal of 671085173207 is 702371580176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671085173207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671085173287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42883982 + ... + 42899627.

It is an arithmetic number, because the mean of its divisors is an integer number (167792741160).

Almost surely, 2^671085173207 is an apocalyptic number.

671085173207 is a deficient number, since it is larger than the sum of its proper divisors (85791433).

671085173207 is an equidigital number, since it uses as much as digits as its factorization.

671085173207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85791432.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 671085173207 in words is "six hundred seventy-one billion, eighty-five million, one hundred seventy-three thousand, two hundred seven".