166225454151 has 4 divisors (see below), whose sum is σ = 221633938872. Its totient is φ = 110816969432.

The previous prime is 166225454141. The next prime is 166225454209. The reversal of 166225454151 is 151454522661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 166225454151 - 2¹¹ = 166225452103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166225454141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27704242356 + ... + 27704242361.

It is an arithmetic number, because the mean of its divisors is an integer number (55408484718).

Almost surely, 2^166225454151 is an apocalyptic number.

166225454151 is a deficient number, since it is larger than the sum of its proper divisors (55408484721).

166225454151 is an equidigital number, since it uses as much as digits as its factorization.

166225454151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55408484720.

The product of its digits is 288000, while the sum is 42.

The spelling of 166225454151 in words is "one hundred sixty-six billion, two hundred twenty-five million, four hundred fifty-four thousand, one hundred fifty-one".