163665036 has 30 divisors (see below), whose sum is σ = 427853580. Its totient is φ = 54554904.

The previous prime is 163665017. The next prime is 163665041. The reversal of 163665036 is 630566361.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 252246 + ... + 252893.

It is an arithmetic number, because the mean of its divisors is an integer number (14261786).

Almost surely, 2^163665036 is an apocalyptic number.

It is an amenable number.

163665036 is an abundant number, since it is smaller than the sum of its proper divisors (264188544).

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

163665036 is a wasteful number, since it uses less digits than its factorization.

163665036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505155 (or 505144 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 163665036 is about 12793.1636431338. The cubic root of 163665036 is about 546.9974521592.

The spelling of 163665036 in words is "one hundred sixty-three million, six hundred sixty-five thousand, thirty-six".