663017161 has 4 divisors (see below), whose sum is σ = 674254800. Its totient is φ = 651779524.

The previous prime is 663017149. The next prime is 663017177. The reversal of 663017161 is 161710366.

663017161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 663017161 - 2²¹ = 660920009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663011161) 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, 5618731 + ... + 5618848.

It is an arithmetic number, because the mean of its divisors is an integer number (168563700).

Almost surely, 2^663017161 is an apocalyptic number.

It is an amenable number.

663017161 is a deficient number, since it is larger than the sum of its proper divisors (11237639).

663017161 is a wasteful number, since it uses less digits than its factorization.

663017161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11237638.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 663017161 is about 25749.1196160179. The cubic root of 663017161 is about 871.9834786485.

The spelling of 663017161 in words is "six hundred sixty-three million, seventeen thousand, one hundred sixty-one".