660145642 has 8 divisors (see below), whose sum is σ = 1066389156. Its totient is φ = 304682592.

The previous prime is 660145627. The next prime is 660145657. The reversal of 660145642 is 246541066.

660145642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (660145627) and next prime (660145657).

It can be written as a sum of positive squares in 2 ways, for example, as 651729841 + 8415801 = 25529^2 + 2901^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 660145598 and 660145607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12695083 + ... + 12695134.

Almost surely, 2^660145642 is an apocalyptic number.

660145642 is a deficient number, since it is larger than the sum of its proper divisors (406243514).

660145642 is a wasteful number, since it uses less digits than its factorization.

660145642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25390232.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 660145642 is about 25693.2995545531. The cubic root of 660145642 is about 870.7228070761.

The spelling of 660145642 in words is "six hundred sixty million, one hundred forty-five thousand, six hundred forty-two".