163661206 has 8 divisors (see below), whose sum is σ = 245607624. Its totient is φ = 81792000.

The previous prime is 163661189. The next prime is 163661207. The reversal of 163661206 is 602166361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163661207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13675 + ... + 22678.

It is an arithmetic number, because the mean of its divisors is an integer number (30700953).

Almost surely, 2^163661206 is an apocalyptic number.

163661206 is a deficient number, since it is larger than the sum of its proper divisors (81946418).

163661206 is a wasteful number, since it uses less digits than its factorization.

163661206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38606.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 163661206 is about 12793.0139529354. The cubic root of 163661206 is about 546.9931852805.

The spelling of 163661206 in words is "one hundred sixty-three million, six hundred sixty-one thousand, two hundred six".