16667780245 has 8 divisors (see below), whose sum is σ = 20045885400. Its totient is φ = 13304524800.

The previous prime is 16667780243. The next prime is 16667780273. The reversal of 16667780245 is 54208776661.

16667780245 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 4 ways, for example, as 7688133124 + 8979647121 = 87682^2 + 94761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16667780245 - 2¹ = 16667780243 is a prime.

It is a super-2 number, since 2×16667780245² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16667780192 and 16667780201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16667780243) 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 7 ways as a sum of consecutive naturals, for example, 3709956 + ... + 3714445.

It is an arithmetic number, because the mean of its divisors is an integer number (2505735675).

Almost surely, 2^16667780245 is an apocalyptic number.

It is an amenable number.

16667780245 is a deficient number, since it is larger than the sum of its proper divisors (3378105155).

16667780245 is an equidigital number, since it uses as much as digits as its factorization.

16667780245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7424855.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 16667780245 in words is "sixteen billion, six hundred sixty-seven million, seven hundred eighty thousand, two hundred forty-five".