16166202321 has 16 divisors (see below), whose sum is σ = 21764852928. Its totient is φ = 10672588800.

The previous prime is 16166202313. The next prime is 16166202323. The reversal of 16166202321 is 12320266161.

It is not a de Polignac number, because 16166202321 - 2³ = 16166202313 is a prime.

It is a super-2 number, since 2×16166202321² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16166202323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967881 + ... + 984441.

It is an arithmetic number, because the mean of its divisors is an integer number (1360303308).

Almost surely, 2^16166202321 is an apocalyptic number.

It is an amenable number.

16166202321 is a deficient number, since it is larger than the sum of its proper divisors (5598650607).

16166202321 is a wasteful number, since it uses less digits than its factorization.

16166202321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19712.

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 16166202321 its reverse (12320266161), we get a palindrome (28486468482).

The spelling of 16166202321 in words is "sixteen billion, one hundred sixty-six million, two hundred two thousand, three hundred twenty-one".