12665301671 has 4 divisors (see below), whose sum is σ = 13816692744. Its totient is φ = 11513910600.

The previous prime is 12665301667. The next prime is 12665301683. The reversal of 12665301671 is 17610356621.

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 12665301671 - 2² = 12665301667 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 (12665304671) 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 3 ways as a sum of consecutive naturals, for example, 575695520 + ... + 575695541.

It is an arithmetic number, because the mean of its divisors is an integer number (3454173186).

Almost surely, 2^12665301671 is an apocalyptic number.

12665301671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12665301671 is a deficient number, since it is larger than the sum of its proper divisors (1151391073).

12665301671 is a wasteful number, since it uses less digits than its factorization.

12665301671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151391072.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 12665301671 in words is "twelve billion, six hundred sixty-five million, three hundred one thousand, six hundred seventy-one".