8145665671 has 24 divisors (see below), whose sum is σ = 10061503200. Its totient is φ = 6538297920.

The previous prime is 8145665657. The next prime is 8145665687. The reversal of 8145665671 is 1765665418.

It is not a de Polignac number, because 8145665671 - 2¹⁵ = 8145632903 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 (8145665641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76396 + ... + 148753.

It is an arithmetic number, because the mean of its divisors is an integer number (419229300).

Almost surely, 2^8145665671 is an apocalyptic number.

8145665671 is a deficient number, since it is larger than the sum of its proper divisors (1915837529).

8145665671 is a wasteful number, since it uses less digits than its factorization.

8145665671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225207 (or 225196 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The square root of 8145665671 is about 90253.3416057267. The cubic root of 8145665671 is about 2012.0658669597.

The spelling of 8145665671 in words is "eight billion, one hundred forty-five million, six hundred sixty-five thousand, six hundred seventy-one".