166169228135 has 4 divisors (see below), whose sum is σ = 199403073768. Its totient is φ = 132935382504.

The previous prime is 166169228117. The next prime is 166169228161. The reversal of 166169228135 is 531822961661.

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 166169228135 - 2¹⁰ = 166169227111 is a prime.

It is a super-2 number, since 2×166169228135² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16616922809 + ... + 16616922818.

It is an arithmetic number, because the mean of its divisors is an integer number (49850768442).

Almost surely, 2^166169228135 is an apocalyptic number.

166169228135 is a deficient number, since it is larger than the sum of its proper divisors (33233845633).

166169228135 is an equidigital number, since it uses as much as digits as its factorization.

166169228135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33233845632.

The product of its digits is 933120, while the sum is 50.

The spelling of 166169228135 in words is "one hundred sixty-six billion, one hundred sixty-nine million, two hundred twenty-eight thousand, one hundred thirty-five".