12665804853 has 8 divisors (see below), whose sum is σ = 18186796768. Its totient is φ = 7794341424.

The previous prime is 12665804791. The next prime is 12665804861. The reversal of 12665804853 is 35840856621.

It is a happy number.

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

It is not a de Polignac number, because 12665804853 - 2¹⁴ = 12665788469 is a prime.

It is a super-2 number, since 2×12665804853² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665804873) 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, 162382075 + ... + 162382152.

It is an arithmetic number, because the mean of its divisors is an integer number (2273349596).

Almost surely, 2^12665804853 is an apocalyptic number.

12665804853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12665804853 is a deficient number, since it is larger than the sum of its proper divisors (5520991915).

12665804853 is a wasteful number, since it uses less digits than its factorization.

12665804853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324764243.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 12665804853 in words is "twelve billion, six hundred sixty-five million, eight hundred four thousand, eight hundred fifty-three".