161366208 has 112 divisors (see below), whose sum is σ = 448848480. Its totient is φ = 51093504.

The previous prime is 161366203. The next prime is 161366267. The reversal of 161366208 is 802663161.

It is a Cunningham number, because it is equal to 12703²-1.

It is not an unprimeable number, because it can be changed into a prime (161366203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406266 + ... + 406662.

Almost surely, 2^161366208 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 161366208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224424240).

161366208 is an abundant number, since it is smaller than the sum of its proper divisors (287482272).

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

161366208 is a wasteful number, since it uses less digits than its factorization.

161366208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 161366208 is about 12702.9999606392. Note that the first 4 decimals coincide. The cubic root of 161366208 is about 544.4243373141.

The spelling of 161366208 in words is "one hundred sixty-one million, three hundred sixty-six thousand, two hundred eight".