163661304 has 16 divisors (see below), whose sum is σ = 409153320. Its totient is φ = 54553760.

The previous prime is 163661273. The next prime is 163661317. The reversal of 163661304 is 403166361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3409587 + ... + 3409634.

Almost surely, 2^163661304 is an apocalyptic number.

It is an amenable number.

163661304 is an abundant number, since it is smaller than the sum of its proper divisors (245492016).

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

163661304 is a wasteful number, since it uses less digits than its factorization.

163661304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819230 (or 6819226 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 163661304 is about 12793.0177831503. The cubic root of 163661304 is about 546.9932944600.

The spelling of 163661304 in words is "one hundred sixty-three million, six hundred sixty-one thousand, three hundred four".