506166157 has 4 divisors (see below), whose sum is σ = 578475616. Its totient is φ = 433856700.

The previous prime is 506166151. The next prime is 506166161. The reversal of 506166157 is 751661605.

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, and also an emirpimes, since its reverse is a distinct semiprime: 751661605 = 5 ⋅150332321.

It is a cyclic number.

It is not a de Polignac number, because 506166157 - 2³ = 506166149 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 (506166151) 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, 36154719 + ... + 36154732.

It is an arithmetic number, because the mean of its divisors is an integer number (144618904).

Almost surely, 2^506166157 is an apocalyptic number.

It is an amenable number.

506166157 is a deficient number, since it is larger than the sum of its proper divisors (72309459).

506166157 is an equidigital number, since it uses as much as digits as its factorization.

506166157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72309458.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 506166157 is about 22498.1367450729. The cubic root of 506166157 is about 796.9499261949.

The spelling of 506166157 in words is "five hundred six million, one hundred sixty-six thousand, one hundred fifty-seven".