665651060 has 12 divisors (see below), whose sum is σ = 1397867268. Its totient is φ = 266260416.

The previous prime is 665651047. The next prime is 665651071. The reversal of 665651060 is 60156566.

It can be written as a sum of positive squares in 2 ways, for example, as 484264036 + 181387024 = 22006^2 + 13468^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 665651060.

It is a congruent number.

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, 16641257 + ... + 16641296.

It is an arithmetic number, because the mean of its divisors is an integer number (116488939).

Almost surely, 2^665651060 is an apocalyptic number.

It is an amenable number.

665651060 is an abundant number, since it is smaller than the sum of its proper divisors (732216208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665651060 is a wasteful number, since it uses less digits than its factorization.

665651060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33282562 (or 33282560 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 665651060 is about 25800.2143401949. The cubic root of 665651060 is about 873.1366322084.

The spelling of 665651060 in words is "six hundred sixty-five million, six hundred fifty-one thousand, sixty".