660442046 has 16 divisors (see below), whose sum is σ = 1083317760. Its totient is φ = 299480280.

The previous prime is 660442019. The next prime is 660442049. The reversal of 660442046 is 640244066.

It is a super-2 number, since 2×660442046² = 872367392249332232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660442049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26606 + ... + 45041.

It is an arithmetic number, because the mean of its divisors is an integer number (67707360).

Almost surely, 2^660442046 is an apocalyptic number.

660442046 is a deficient number, since it is larger than the sum of its proper divisors (422875714).

660442046 is a wasteful number, since it uses less digits than its factorization.

660442046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72079.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 660442046 is about 25699.0670258669. The cubic root of 660442046 is about 870.8531051444.

The spelling of 660442046 in words is "six hundred sixty million, four hundred forty-two thousand, forty-six".