166709452 has 48 divisors (see below), whose sum is σ = 367451392. Its totient is φ = 64411200.

The previous prime is 166709449. The next prime is 166709453. The reversal of 166709452 is 254907661.

It is a super-2 number, since 2×166709452² = 55584082772280608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166709453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10327 + ... + 20977.

Almost surely, 2^166709452 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 166709452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183725696).

166709452 is an abundant number, since it is smaller than the sum of its proper divisors (200741940).

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

166709452 is a wasteful number, since it uses less digits than its factorization.

166709452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10718 (or 10716 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 166709452 is about 12911.6014498590. The cubic root of 166709452 is about 550.3682954727.

The spelling of 166709452 in words is "one hundred sixty-six million, seven hundred nine thousand, four hundred fifty-two".