166254157 has 4 divisors (see below), whose sum is σ = 168358720. Its totient is φ = 164149596.

The previous prime is 166254131. The next prime is 166254191. The reversal of 166254157 is 751452661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166254157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166254197) 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, 1052163 + ... + 1052320.

It is an arithmetic number, because the mean of its divisors is an integer number (42089680).

Almost surely, 2^166254157 is an apocalyptic number.

It is an amenable number.

166254157 is a deficient number, since it is larger than the sum of its proper divisors (2104563).

166254157 is an equidigital number, since it uses as much as digits as its factorization.

166254157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104562.

The product of its digits is 50400, while the sum is 37.

The square root of 166254157 is about 12893.9581587657. The cubic root of 166254157 is about 549.8668074170.

The spelling of 166254157 in words is "one hundred sixty-six million, two hundred fifty-four thousand, one hundred fifty-seven".