670206173 has 18 divisors (see below), whose sum is σ = 844222554. Its totient is φ = 530266464.

The previous prime is 670206169. The next prime is 670206179. The reversal of 670206173 is 371602076.

It can be written as a sum of positive squares in 3 ways, for example, as 1570009 + 668636164 = 1253^2 + 25858^2 .

It is not a de Polignac number, because 670206173 - 2² = 670206169 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670206179) 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 17 ways as a sum of consecutive naturals, for example, 32186 + ... + 48747.

It is an arithmetic number, because the mean of its divisors is an integer number (46901253).

Almost surely, 2^670206173 is an apocalyptic number.

It is an amenable number.

670206173 is a deficient number, since it is larger than the sum of its proper divisors (174016381).

670206173 is a wasteful number, since it uses less digits than its factorization.

670206173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80973 (or 80953 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 670206173 is about 25888.3404837004. The cubic root of 670206173 is about 875.1237584950.

The spelling of 670206173 in words is "six hundred seventy million, two hundred six thousand, one hundred seventy-three".