660663163 has 8 divisors (see below), whose sum is σ = 699781680. Its totient is φ = 621573120.

The previous prime is 660663149. The next prime is 660663191. The reversal of 660663163 is 361366066.

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

It is a cyclic number.

It is not a de Polignac number, because 660663163 - 2⁵ = 660663131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660663863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57483 + ... + 68011.

It is an arithmetic number, because the mean of its divisors is an integer number (87472710).

Almost surely, 2^660663163 is an apocalyptic number.

660663163 is a deficient number, since it is larger than the sum of its proper divisors (39118517).

660663163 is a wasteful number, since it uses less digits than its factorization.

660663163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14237.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 660663163 is about 25703.3687091790. The cubic root of 660663163 is about 870.9502819476.

The spelling of 660663163 in words is "six hundred sixty million, six hundred sixty-three thousand, one hundred sixty-three".