671717165 has 64 divisors (see below), whose sum is σ = 999959040. Its totient is φ = 423014400.

The previous prime is 671717153. The next prime is 671717173. The reversal of 671717165 is 561717176.

It is not a de Polignac number, because 671717165 - 2⁴ = 671717149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4902977 + ... + 4903113.

It is an arithmetic number, because the mean of its divisors is an integer number (15624360).

Almost surely, 2^671717165 is an apocalyptic number.

It is an amenable number.

671717165 is a deficient number, since it is larger than the sum of its proper divisors (328241875).

671717165 is a wasteful number, since it uses less digits than its factorization.

671717165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its digits is 61740, while the sum is 41.

The square root of 671717165 is about 25917.5069209984. The cubic root of 671717165 is about 875.7809256842.

The spelling of 671717165 in words is "six hundred seventy-one million, seven hundred seventeen thousand, one hundred sixty-five".