166425152201 has 24 divisors (see below), whose sum is σ = 209139712320. Its totient is φ = 129634354080.

The previous prime is 166425152197. The next prime is 166425152239. The reversal of 166425152201 is 102251524661.

It is not a de Polignac number, because 166425152201 - 2² = 166425152197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166425152251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2368310 + ... + 2437568.

It is an arithmetic number, because the mean of its divisors is an integer number (8714154680).

Almost surely, 2^166425152201 is an apocalyptic number.

166425152201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166425152201 is a deficient number, since it is larger than the sum of its proper divisors (42714560119).

166425152201 is a wasteful number, since it uses less digits than its factorization.

166425152201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72125 (or 72114 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 166425152201 its reverse (102251524661), we get a palindrome (268676676862).

The spelling of 166425152201 in words is "one hundred sixty-six billion, four hundred twenty-five million, one hundred fifty-two thousand, two hundred one".