166451072 has 32 divisors (see below), whose sum is σ = 333050400. Its totient is φ = 82862080.

The previous prime is 166451057. The next prime is 166451083. The reversal of 166451072 is 270154661.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 27872 + ... + 33312.

It is an arithmetic number, because the mean of its divisors is an integer number (10407825).

Almost surely, 2^166451072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166451072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166525200).

166451072 is an abundant number, since it is smaller than the sum of its proper divisors (166599328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166451072 is an equidigital number, since it uses as much as digits as its factorization.

166451072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694 (or 5682 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 166451072 is about 12901.5918397692. The cubic root of 166451072 is about 550.0838131226.

The spelling of 166451072 in words is "one hundred sixty-six million, four hundred fifty-one thousand, seventy-two".