660775165 has 8 divisors (see below), whose sum is σ = 827405568. Its totient is φ = 505636560.

The previous prime is 660775133. The next prime is 660775177. The reversal of 660775165 is 561577066.

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

It is not a de Polignac number, because 660775165 - 2⁵ = 660775133 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 2872821 + ... + 2873050.

It is an arithmetic number, because the mean of its divisors is an integer number (103425696).

Almost surely, 2^660775165 is an apocalyptic number.

It is an amenable number.

660775165 is a deficient number, since it is larger than the sum of its proper divisors (166630403).

660775165 is a wasteful number, since it uses less digits than its factorization.

660775165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745899.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 660775165 is about 25705.5473584983. The cubic root of 660775165 is about 870.9994964677. Note that the first 3 decimals are identical.

The spelling of 660775165 in words is "six hundred sixty million, seven hundred seventy-five thousand, one hundred sixty-five".