660163663 has 8 divisors (see below), whose sum is σ = 670554800. Its totient is φ = 649788480.

The previous prime is 660163643. The next prime is 660163717. The reversal of 660163663 is 366361066.

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 660163663 - 2¹⁷ = 660032591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660163633) 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, 100603 + ... + 106963.

It is an arithmetic number, because the mean of its divisors is an integer number (83819350).

Almost surely, 2^660163663 is an apocalyptic number.

660163663 is a deficient number, since it is larger than the sum of its proper divisors (10391137).

660163663 is a wasteful number, since it uses less digits than its factorization.

660163663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977.

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

The square root of 660163663 is about 25693.6502467049. The cubic root of 660163663 is about 870.7307301524.

The spelling of 660163663 in words is "six hundred sixty million, one hundred sixty-three thousand, six hundred sixty-three".