660065572 has 12 divisors (see below), whose sum is σ = 1155508060. Its totient is φ = 329920416.

The previous prime is 660065561. The next prime is 660065591. The reversal of 660065572 is 275560066.

It can be written as a sum of positive squares in 2 ways, for example, as 53231616 + 606833956 = 7296^2 + 24634^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 14103 + ... + 38974.

Almost surely, 2^660065572 is an apocalyptic number.

It is an amenable number.

660065572 is a deficient number, since it is larger than the sum of its proper divisors (495442488).

660065572 is a wasteful number, since it uses less digits than its factorization.

660065572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56190 (or 56188 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 660065572 is about 25691.7413189531. The cubic root of 660065572 is about 870.6876019185.

The spelling of 660065572 in words is "six hundred sixty million, sixty-five thousand, five hundred seventy-two".