13552166865 has 16 divisors (see below), whose sum is σ = 21747817728. Its totient is φ = 7206372096.

The previous prime is 13552166857. The next prime is 13552166867. The reversal of 13552166865 is 56866125531.

It is a happy number.

It is not a de Polignac number, because 13552166865 - 2³ = 13552166857 is a prime.

It is a super-2 number, since 2×13552166865² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13552166867) 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 15 ways as a sum of consecutive naturals, for example, 1335417 + ... + 1345526.

It is an arithmetic number, because the mean of its divisors is an integer number (1359238608).

Almost surely, 2^13552166865 is an apocalyptic number.

13552166865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13552166865 is a deficient number, since it is larger than the sum of its proper divisors (8195650863).

13552166865 is a wasteful number, since it uses less digits than its factorization.

13552166865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681288.

The product of its digits is 1296000, while the sum is 48.

The spelling of 13552166865 in words is "thirteen billion, five hundred fifty-two million, one hundred sixty-six thousand, eight hundred sixty-five".