16662361699369 has 8 divisors (see below), whose sum is σ = 16811039706120. Its totient is φ = 16513705157376.

The previous prime is 16662361699343. The next prime is 16662361699393. The reversal of 16662361699369 is 96399616326661.

It can be written as a sum of positive squares in 4 ways, for example, as 5005511290000 + 11656850409369 = 2237300^2 + 3414213^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16662361699369 - 2⁷ = 16662361699241 is a prime.

It is a super-2 number, since 2×16662361699369² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16662361699309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3804714 + ... + 6913795.

It is an arithmetic number, because the mean of its divisors is an integer number (2101379963265).

Almost surely, 2^{16662361699369} is an apocalyptic number.

It is an amenable number.

16662361699369 is a deficient number, since it is larger than the sum of its proper divisors (148678006751).

16662361699369 is a wasteful number, since it uses less digits than its factorization.

16662361699369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10732379.

The product of its digits is 612220032, while the sum is 73.

The spelling of 16662361699369 in words is "sixteen trillion, six hundred sixty-two billion, three hundred sixty-one million, six hundred ninety-nine thousand, three hundred sixty-nine".