16368666205 has 4 divisors (see below), whose sum is σ = 19642399452. Its totient is φ = 13094932960.

The previous prime is 16368666203. The next prime is 16368666287. The reversal of 16368666205 is 50266686361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5803087684 + 10565578521 = 76178^2 + 102789^2 .

It is not a de Polignac number, because 16368666205 - 2¹ = 16368666203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16368666203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1636866616 + ... + 1636866625.

It is an arithmetic number, because the mean of its divisors is an integer number (4910599863).

Almost surely, 2^16368666205 is an apocalyptic number.

It is an amenable number.

16368666205 is a deficient number, since it is larger than the sum of its proper divisors (3273733247).

16368666205 is an equidigital number, since it uses as much as digits as its factorization.

16368666205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273733246.

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

The spelling of 16368666205 in words is "sixteen billion, three hundred sixty-eight million, six hundred sixty-six thousand, two hundred five".