4165997671 has 4 divisors (see below), whose sum is σ = 4544724744. Its totient is φ = 3787270600.

The previous prime is 4165997657. The next prime is 4165997677. The reversal of 4165997671 is 1767995614.

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

It is a cyclic number.

It is not a de Polignac number, because 4165997671 - 2⁹ = 4165997159 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 (4165997677) 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, 189363520 + ... + 189363541.

It is an arithmetic number, because the mean of its divisors is an integer number (1136181186).

Almost surely, 2^4165997671 is an apocalyptic number.

4165997671 is a deficient number, since it is larger than the sum of its proper divisors (378727073).

4165997671 is a wasteful number, since it uses less digits than its factorization.

4165997671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378727072.

The product of its digits is 2857680, while the sum is 55.

The square root of 4165997671 is about 64544.5402106174. The cubic root of 4165997671 is about 1609.0628486379.

The spelling of 4165997671 in words is "four billion, one hundred sixty-five million, nine hundred ninety-seven thousand, six hundred seventy-one".