16665252645 has 64 divisors (see below), whose sum is σ = 28237676544. Its totient is φ = 8379624960.

The previous prime is 16665252619. The next prime is 16665252649. The reversal of 16665252645 is 54625256661.

16665252645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16665252645 - 2¹¹ = 16665250597 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16665252594 and 16665252603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665252649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10056657 + ... + 10058313.

It is an arithmetic number, because the mean of its divisors is an integer number (441213696).

Almost surely, 2^16665252645 is an apocalyptic number.

16665252645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16665252645 is a deficient number, since it is larger than the sum of its proper divisors (11572423899).

16665252645 is a wasteful number, since it uses less digits than its factorization.

16665252645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242.

The product of its digits is 2592000, while the sum is 48.

The spelling of 16665252645 in words is "sixteen billion, six hundred sixty-five million, two hundred fifty-two thousand, six hundred forty-five".