166202440545225 has 96 divisors (see below), whose sum is σ = 316945736039680. Its totient is φ = 75276190080000.

The previous prime is 166202440545187. The next prime is 166202440545227. The reversal of 166202440545225 is 522545044202661.

It is not a de Polignac number, because 166202440545225 - 2¹¹ = 166202440543177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166202440545227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 937314075 + ... + 937491375.

Almost surely, 2^{166202440545225} is an apocalyptic number.

166202440545225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166202440545225 is a deficient number, since it is larger than the sum of its proper divisors (150743295494455).

166202440545225 is a wasteful number, since it uses less digits than its factorization.

166202440545225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193811 (or 193806 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 48.

Adding to 166202440545225 its reverse (522545044202661), we get a palindrome (688747484747886).

The spelling of 166202440545225 in words is "one hundred sixty-six trillion, two hundred two billion, four hundred forty million, five hundred forty-five thousand, two hundred twenty-five".