166197808 has 60 divisors (see below), whose sum is σ = 381035880. Its totient is φ = 70000896.

The previous prime is 166197803. The next prime is 166197809. The reversal of 166197808 is 808791661.

It is a super-2 number, since 2×166197808² = 55243422768009728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166197803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44460 + ... + 48052.

It is an arithmetic number, because the mean of its divisors is an integer number (6350598).

Almost surely, 2^166197808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166197808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190517940).

166197808 is an abundant number, since it is smaller than the sum of its proper divisors (214838072).

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

166197808 is a wasteful number, since it uses less digits than its factorization.

166197808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674 (or 3661 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 166197808 is about 12891.7728804071. The cubic root of 166197808 is about 549.8046777506.

The spelling of 166197808 in words is "one hundred sixty-six million, one hundred ninety-seven thousand, eight hundred eight".