660550165 has 16 divisors (see below), whose sum is σ = 870037056. Its totient is φ = 477446400.

The previous prime is 660550153. The next prime is 660550171. The reversal of 660550165 is 561055066.

It is not a de Polignac number, because 660550165 - 2¹⁵ = 660517397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660550165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27876 + ... + 45805.

It is an arithmetic number, because the mean of its divisors is an integer number (54377316).

Almost surely, 2^660550165 is an apocalyptic number.

It is an amenable number.

660550165 is a deficient number, since it is larger than the sum of its proper divisors (209486891).

660550165 is a wasteful number, since it uses less digits than its factorization.

660550165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73860.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 660550165 is about 25701.1704986368. The cubic root of 660550165 is about 870.9006241407.

The spelling of 660550165 in words is "six hundred sixty million, five hundred fifty thousand, one hundred sixty-five".