665746052 has 12 divisors (see below), whose sum is σ = 1170144780. Its totient is φ = 331418976.

The previous prime is 665746033. The next prime is 665746079. The reversal of 665746052 is 250647566.

It can be written as a sum of positive squares in 2 ways, for example, as 572932096 + 92813956 = 23936^2 + 9634^2 .

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, 362483 + ... + 364314.

It is an arithmetic number, because the mean of its divisors is an integer number (97512065).

Almost surely, 2^665746052 is an apocalyptic number.

It is an amenable number.

665746052 is a deficient number, since it is larger than the sum of its proper divisors (504398728).

665746052 is a wasteful number, since it uses less digits than its factorization.

665746052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727030 (or 727028 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 665746052 is about 25802.0551894612. The cubic root of 665746052 is about 873.1781640033.

The spelling of 665746052 in words is "six hundred sixty-five million, seven hundred forty-six thousand, fifty-two".