16664166036265 has 48 divisors (see below), whose sum is σ = 22575915366480. Its totient is φ = 11790962726400.

The previous prime is 16664166036263. The next prime is 16664166036281. The reversal of 16664166036265 is 56263066146661.

It can be written as a sum of positive squares in 8 ways, for example, as 6501536135721 + 10162629900544 = 2549811^2 + 3187888^2 .

It is not a de Polignac number, because 16664166036265 - 2¹ = 16664166036263 is a prime.

It is a super-2 number, since 2×16664166036265² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16664166036263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 506354631 + ... + 506387539.

It is an arithmetic number, because the mean of its divisors is an integer number (470331570135).

Almost surely, 2^{16664166036265} is an apocalyptic number.

It is an amenable number.

16664166036265 is a deficient number, since it is larger than the sum of its proper divisors (5911749330215).

16664166036265 is a wasteful number, since it uses less digits than its factorization.

16664166036265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55594 (or 55583 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 58.

The spelling of 16664166036265 in words is "sixteen trillion, six hundred sixty-four billion, one hundred sixty-six million, thirty-six thousand, two hundred sixty-five".