166997900 has 18 divisors (see below), whose sum is σ = 362385660. Its totient is φ = 66799120.

The previous prime is 166997891. The next prime is 166997903. The reversal of 166997900 is 9799661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (166997903) 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, 834890 + ... + 835089.

Almost surely, 2^166997900 is an apocalyptic number.

166997900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166997900 is an abundant number, since it is smaller than the sum of its proper divisors (195387760).

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

166997900 is a wasteful number, since it uses less digits than its factorization.

166997900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669993 (or 1669986 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 166997900 is about 12922.7667316252. The cubic root of 166997900 is about 550.6855363567.

The spelling of 166997900 in words is "one hundred sixty-six million, nine hundred ninety-seven thousand, nine hundred".