166163560 has 16 divisors (see below), whose sum is σ = 373868100. Its totient is φ = 66465408.

The previous prime is 166163539. The next prime is 166163561. The reversal of 166163560 is 65361661.

It can be written as a sum of positive squares in 2 ways, for example, as 165328164 + 835396 = 12858^2 + 914^2 .

It is a super-2 number, since 2×166163560² = 55220657343747200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166163561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2077005 + ... + 2077084.

Almost surely, 2^166163560 is an apocalyptic number.

166163560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166163560 is an abundant number, since it is smaller than the sum of its proper divisors (207704540).

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

166163560 is a wasteful number, since it uses less digits than its factorization.

166163560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154100 (or 4154096 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 166163560 is about 12890.4445229790. Note that the first 3 decimals coincide. The cubic root of 166163560 is about 549.7669094944.

The spelling of 166163560 in words is "one hundred sixty-six million, one hundred sixty-three thousand, five hundred sixty".