660506516 has 12 divisors (see below), whose sum is σ = 1156096788. Its totient is φ = 330193152.

The previous prime is 660506513. The next prime is 660506549. The reversal of 660506516 is 615605066.

It can be written as a sum of positive squares in 2 ways, for example, as 588256516 + 72250000 = 24254^2 + 8500^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660506513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17540 + ... + 40356.

It is an arithmetic number, because the mean of its divisors is an integer number (96341399).

Almost surely, 2^660506516 is an apocalyptic number.

It is an amenable number.

660506516 is a deficient number, since it is larger than the sum of its proper divisors (495590272).

660506516 is a wasteful number, since it uses less digits than its factorization.

660506516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30058 (or 30056 counting only the distinct ones).

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

The square root of 660506516 is about 25700.3213209485. The cubic root of 660506516 is about 870.8814407485.

The spelling of 660506516 in words is "six hundred sixty million, five hundred six thousand, five hundred sixteen".