660912628 has 12 divisors (see below), whose sum is σ = 1156804740. Its totient is φ = 330396992.

The previous prime is 660912607. The next prime is 660912641. The reversal of 660912628 is 826219066.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 98843364 + 562069264 = 9942^2 + 23708^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18618 + ... + 40846.

It is an arithmetic number, because the mean of its divisors is an integer number (96400395).

Almost surely, 2^660912628 is an apocalyptic number.

It is an amenable number.

660912628 is a deficient number, since it is larger than the sum of its proper divisors (495892112).

660912628 is a wasteful number, since it uses less digits than its factorization.

660912628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29666 (or 29664 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 660912628 is about 25708.2210197439. The cubic root of 660912628 is about 871.0598911418.

The spelling of 660912628 in words is "six hundred sixty million, nine hundred twelve thousand, six hundred twenty-eight".