166525774051 has 48 divisors (see below), whose sum is σ = 209165267136. Its totient is φ = 129078862848.

The previous prime is 166525774031. The next prime is 166525774091. The reversal of 166525774051 is 150477525661.

It is not a de Polignac number, because 166525774051 - 2¹¹ = 166525772003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166525773986 and 166525774004.

It is not an unprimeable number, because it can be changed into a prime (166525774031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 532031071 + ... + 532031383.

It is an arithmetic number, because the mean of its divisors is an integer number (4357609732).

Almost surely, 2^166525774051 is an apocalyptic number.

166525774051 is a deficient number, since it is larger than the sum of its proper divisors (42639493085).

166525774051 is an equidigital number, since it uses as much as digits as its factorization.

166525774051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 166525774051 in words is "one hundred sixty-six billion, five hundred twenty-five million, seven hundred seventy-four thousand, fifty-one".