166989524 has 24 divisors (see below), whose sum is σ = 315124488. Its totient is φ = 76970880.

The previous prime is 166989523. The next prime is 166989533. The reversal of 166989524 is 425989661.

166989524 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 44488900 + 122500624 = 6670^2 + 11068^2 .

It is a super-2 number, since 2×166989524² = 55771002251493152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166989523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50234 + ... + 53454.

It is an arithmetic number, because the mean of its divisors is an integer number (13130187).

Almost surely, 2^166989524 is an apocalyptic number.

It is an amenable number.

166989524 is a deficient number, since it is larger than the sum of its proper divisors (148134964).

166989524 is a wasteful number, since it uses less digits than its factorization.

166989524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235 (or 4233 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 166989524 is about 12922.4426483541. The cubic root of 166989524 is about 550.6763294162.

The spelling of 166989524 in words is "one hundred sixty-six million, nine hundred eighty-nine thousand, five hundred twenty-four".