16665260836 has 27 divisors (see below), whose sum is σ = 33929389137. Its totient is φ = 7141480080.

The previous prime is 16665260819. The next prime is 16665260849. The reversal of 16665260836 is 63806256661.

The square root of 16665260836 is 129094.

It is a perfect power (a square), and thus also a powerful number.

16665260836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 15278443236 + 1386817600 = 123606^2 + 37240^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 16665260836.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 1802706 + ... + 1811926.

Almost surely, 2^16665260836 is an apocalyptic number.

16665260836 is the 129094-th square number.

It is an amenable number.

16665260836 is an abundant number, since it is smaller than the sum of its proper divisors (17264128301).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16665260836 is an frugal number, since it uses more digits than its factorization.

16665260836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18460 (or 9230 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

Multiplying 16665260836 by its sum of digits (49), we get a square (816597780964 = 903658²).

16665260836 divided by its sum of digits (49) gives a square (340107364 = 18442²).

The spelling of 16665260836 in words is "sixteen billion, six hundred sixty-five million, two hundred sixty thousand, eight hundred thirty-six".