166707553 has 6 divisors (see below), whose sum is σ = 172259682. Its totient is φ = 161328960.

The previous prime is 166707551. The next prime is 166707557. The reversal of 166707553 is 355707661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 84768849 + 81938704 = 9207^2 + 9052^2 .

It is not a de Polignac number, because 166707553 - 2¹ = 166707551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166707551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85776 + ... + 87697.

It is an arithmetic number, because the mean of its divisors is an integer number (28709947).

Almost surely, 2^166707553 is an apocalyptic number.

It is an amenable number.

166707553 is a deficient number, since it is larger than the sum of its proper divisors (5552129).

166707553 is an equidigital number, since it uses as much as digits as its factorization.

166707553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173535 (or 173504 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 166707553 is about 12911.5279111343. The cubic root of 166707553 is about 550.3662057024.

The spelling of 166707553 in words is "one hundred sixty-six million, seven hundred seven thousand, five hundred fifty-three".