166444051 has 12 divisors (see below), whose sum is σ = 173503512. Its totient is φ = 159576000.

The previous prime is 166444049. The next prime is 166444063. The reversal of 166444051 is 150444661.

It is not a de Polignac number, because 166444051 - 2¹ = 166444049 is a prime.

It is a super-3 number, since 3×166444051³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166444001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152016 + ... + 153106.

It is an arithmetic number, because the mean of its divisors is an integer number (14458626).

Almost surely, 2^166444051 is an apocalyptic number.

166444051 is a deficient number, since it is larger than the sum of its proper divisors (7059461).

166444051 is an equidigital number, since it uses as much as digits as its factorization.

166444051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 166444051 is about 12901.3197386934. The cubic root of 166444051 is about 550.0760787321.

The spelling of 166444051 in words is "one hundred sixty-six million, four hundred forty-four thousand, fifty-one".