166601900 has 18 divisors (see below), whose sum is σ = 361526340. Its totient is φ = 66640720.

The previous prime is 166601893. The next prime is 166601917. The reversal of 166601900 is 9106661.

166601900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166601900² = 55512386167220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 832910 + ... + 833109.

Almost surely, 2^166601900 is an apocalyptic number.

166601900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166601900 is an abundant number, since it is smaller than the sum of its proper divisors (194924440).

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

166601900 is a wasteful number, since it uses less digits than its factorization.

166601900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666033 (or 1666026 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 166601900 is about 12907.4358414055. The cubic root of 166601900 is about 550.2499139728.

The spelling of 166601900 in words is "one hundred sixty-six million, six hundred one thousand, nine hundred".