12165866137 has 8 divisors (see below), whose sum is σ = 12227237000. Its totient is φ = 12104567424.

The previous prime is 12165866131. The next prime is 12165866143. The reversal of 12165866137 is 73166856121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12165866131) and next prime (12165866143).

It can be written as a sum of positive squares in 4 ways, for example, as 6861802896 + 5304063241 = 82836^2 + 72829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12165866137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12165866131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337573 + ... + 371869.

It is an arithmetic number, because the mean of its divisors is an integer number (1528404625).

Almost surely, 2^12165866137 is an apocalyptic number.

It is an amenable number.

12165866137 is a deficient number, since it is larger than the sum of its proper divisors (61370863).

12165866137 is a wasteful number, since it uses less digits than its factorization.

12165866137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36075.

The product of its digits is 362880, while the sum is 46.

The spelling of 12165866137 in words is "twelve billion, one hundred sixty-five million, eight hundred sixty-six thousand, one hundred thirty-seven".