166601156 has 12 divisors (see below), whose sum is σ = 308702268. Its totient is φ = 78400512.

The previous prime is 166601153. The next prime is 166601189. The reversal of 166601156 is 651106661.

It can be written as a sum of positive squares in 2 ways, for example, as 115906756 + 50694400 = 10766^2 + 7120^2 .

It is not an unprimeable number, because it can be changed into a prime (166601153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224941 + ... + 1225076.

It is an arithmetic number, because the mean of its divisors is an integer number (25725189).

Almost surely, 2^166601156 is an apocalyptic number.

It is an amenable number.

166601156 is a deficient number, since it is larger than the sum of its proper divisors (142101112).

166601156 is a wasteful number, since it uses less digits than its factorization.

166601156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450038 (or 2450036 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 166601156 is about 12907.4070207769. The cubic root of 166601156 is about 550.2490948814.

The spelling of 166601156 in words is "one hundred sixty-six million, six hundred one thousand, one hundred fifty-six".