16661301430325 has 48 divisors (see below), whose sum is σ = 22078336896000. Its totient is φ = 12428572400640.

The previous prime is 16661301430321. The next prime is 16661301430387. The reversal of 16661301430325 is 52303410316661.

It is not a de Polignac number, because 16661301430325 - 2² = 16661301430321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661301430321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 804145316 + ... + 804166034.

It is an arithmetic number, because the mean of its divisors is an integer number (459965352000).

Almost surely, 2^{16661301430325} is an apocalyptic number.

It is an amenable number.

16661301430325 is a deficient number, since it is larger than the sum of its proper divisors (5417035465675).

16661301430325 is a wasteful number, since it uses less digits than its factorization.

16661301430325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38214 (or 38209 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

Adding to 16661301430325 its reverse (52303410316661), we get a palindrome (68964711746986).

The spelling of 16661301430325 in words is "sixteen trillion, six hundred sixty-one billion, three hundred one million, four hundred thirty thousand, three hundred twenty-five".