166198280 has 32 divisors (see below), whose sum is σ = 380289600. Its totient is φ = 65351616.

The previous prime is 166198271. The next prime is 166198289. The reversal of 166198280 is 82891661.

It is an interprime number because it is at equal distance from previous prime (166198271) and next prime (166198289).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166198289) 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, 32852 + ... + 37571.

It is an arithmetic number, because the mean of its divisors is an integer number (11884050).

Almost surely, 2^166198280 is an apocalyptic number.

166198280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166198280 is an abundant number, since it is smaller than the sum of its proper divisors (214091320).

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

166198280 is a wasteful number, since it uses less digits than its factorization.

166198280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70493 (or 70489 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 166198280 is about 12891.7911866428. The cubic root of 166198280 is about 549.8051982299.

The spelling of 166198280 in words is "one hundred sixty-six million, one hundred ninety-eight thousand, two hundred eighty".