660032661 has 8 divisors (see below), whose sum is σ = 887832000. Its totient is φ = 436127552.

The previous prime is 660032651. The next prime is 660032713. The reversal of 660032661 is 166230066.

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 660032661 - 2¹⁰ = 660031637 is a prime.

It is a super-2 number, since 2×660032661² = 871286227173481842, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660032641) 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, 973161 + ... + 973838.

It is an arithmetic number, because the mean of its divisors is an integer number (110979000).

Almost surely, 2^660032661 is an apocalyptic number.

It is an amenable number.

660032661 is a deficient number, since it is larger than the sum of its proper divisors (227799339).

660032661 is a wasteful number, since it uses less digits than its factorization.

660032661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947115.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 660032661 is about 25691.1008133167. The cubic root of 660032661 is about 870.6731307926.

The spelling of 660032661 in words is "six hundred sixty million, thirty-two thousand, six hundred sixty-one".