8166338135525 has 24 divisors (see below), whose sum is σ = 10234926188424. Its totient is φ = 6463069184000.

The previous prime is 8166338135513. The next prime is 8166338135533. The reversal of 8166338135525 is 5255318336618.

It can be written as a sum of positive squares in 12 ways, for example, as 316921709764 + 7849416425761 = 562958^2 + 2801681^2 .

It is not a de Polignac number, because 8166338135525 - 2²⁴ = 8166321358309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1744169 + ... + 4401681.

It is an arithmetic number, because the mean of its divisors is an integer number (426455257851).

Almost surely, 2^{8166338135525} is an apocalyptic number.

It is an amenable number.

8166338135525 is a deficient number, since it is larger than the sum of its proper divisors (2068588052899).

8166338135525 is a wasteful number, since it uses less digits than its factorization.

8166338135525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658841 (or 2658836 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 56.

The spelling of 8166338135525 in words is "eight trillion, one hundred sixty-six billion, three hundred thirty-eight million, one hundred thirty-five thousand, five hundred twenty-five".