163689668 has 12 divisors (see below), whose sum is σ = 303307452. Its totient is φ = 77030400.

The previous prime is 163689667. The next prime is 163689677. The reversal of 163689668 is 866986361.

It can be written as a sum of positive squares in 2 ways, for example, as 151979584 + 11710084 = 12328^2 + 3422^2 .

It is not an unprimeable number, because it can be changed into a prime (163689661) 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, 1203533 + ... + 1203668.

It is an arithmetic number, because the mean of its divisors is an integer number (25275621).

Almost surely, 2^163689668 is an apocalyptic number.

It is an amenable number.

163689668 is a deficient number, since it is larger than the sum of its proper divisors (139617784).

163689668 is a wasteful number, since it uses less digits than its factorization.

163689668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407222 (or 2407220 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The square root of 163689668 is about 12794.1263085840. The cubic root of 163689668 is about 547.0248922806.

The spelling of 163689668 in words is "one hundred sixty-three million, six hundred eighty-nine thousand, six hundred sixty-eight".