660170065 has 8 divisors (see below), whose sum is σ = 819521640. Its totient is φ = 509924352.

The previous prime is 660170059. The next prime is 660170087. The reversal of 660170065 is 560071066.

660170065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 61340224 + 598829841 = 7832^2 + 24471^2 .

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 660170065 - 2¹⁷ = 660038993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276304 + ... + 2276593.

It is an arithmetic number, because the mean of its divisors is an integer number (102440205).

Almost surely, 2^660170065 is an apocalyptic number.

It is an amenable number.

660170065 is a deficient number, since it is larger than the sum of its proper divisors (159351575).

660170065 is a wasteful number, since it uses less digits than its factorization.

660170065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552931.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 660170065 is about 25693.7748297131. The cubic root of 660170065 is about 870.7335448081.

The spelling of 660170065 in words is "six hundred sixty million, one hundred seventy thousand, sixty-five".