166197408 has 192 divisors, whose sum is σ = 509160960. Its totient is φ = 47029248.

The previous prime is 166197337. The next prime is 166197413. The reversal of 166197408 is 804791661.

It is a self number, because there is not a number n which added to its sum of digits gives 166197408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1019535 + ... + 1019697.

It is an arithmetic number, because the mean of its divisors is an integer number (2651880).

Almost surely, 2^166197408 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 166197408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254580480).

166197408 is an abundant number, since it is smaller than the sum of its proper divisors (342963552).

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

166197408 is a wasteful number, since it uses less digits than its factorization.

166197408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 166197408 is about 12891.7573666277. The cubic root of 166197408 is about 549.8042366657.

The spelling of 166197408 in words is "one hundred sixty-six million, one hundred ninety-seven thousand, four hundred eight".