671671165 has 16 divisors (see below), whose sum is σ = 888350400. Its totient is φ = 483448320.

The previous prime is 671671159. The next prime is 671671237. The reversal of 671671165 is 561176176.

It is not a de Polignac number, because 671671165 - 2³ = 671671157 is a prime.

It is a super-2 number, since 2×671671165² = 902284307784914450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57615 + ... + 68284.

It is an arithmetic number, because the mean of its divisors is an integer number (55521900).

Almost surely, 2^671671165 is an apocalyptic number.

It is an amenable number.

671671165 is a deficient number, since it is larger than the sum of its proper divisors (216679235).

671671165 is a wasteful number, since it uses less digits than its factorization.

671671165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126012.

The product of its digits is 52920, while the sum is 40.

The square root of 671671165 is about 25916.6194747695. The cubic root of 671671165 is about 875.7609337172.

The spelling of 671671165 in words is "six hundred seventy-one million, six hundred seventy-one thousand, one hundred sixty-five".