660118642 has 4 divisors (see below), whose sum is σ = 990177966. Its totient is φ = 330059320.

The previous prime is 660118597. The next prime is 660118643. The reversal of 660118642 is 246811066.

660118642 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.

It can be written as a sum of positive squares in only one way, i.e., 636098841 + 24019801 = 25221^2 + 4901^2 .

It is a junction number, because it is equal to n+sod(n) for n = 660118598 and 660118607.

It is not an unprimeable number, because it can be changed into a prime (660118643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165029659 + ... + 165029662.

Almost surely, 2^660118642 is an apocalyptic number.

660118642 is a deficient number, since it is larger than the sum of its proper divisors (330059324).

660118642 is a wasteful number, since it uses less digits than its factorization.

660118642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330059323.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 660118642 is about 25692.7741203631. The cubic root of 660118642 is about 870.7109360410.

The spelling of 660118642 in words is "six hundred sixty million, one hundred eighteen thousand, six hundred forty-two".