660780536 has 24 divisors (see below), whose sum is σ = 1341602280. Its totient is φ = 304975008.

The previous prime is 660780529. The next prime is 660780553. The reversal of 660780536 is 635087066.

It is a junction number, because it is equal to n+sod(n) for n = 660780493 and 660780502.

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 5 ways as a sum of consecutive naturals, for example, 243020 + ... + 245723.

It is an arithmetic number, because the mean of its divisors is an integer number (55900095).

Almost surely, 2^660780536 is an apocalyptic number.

It is an amenable number.

660780536 is an abundant number, since it is smaller than the sum of its proper divisors (680821744).

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

660780536 is a wasteful number, since it uses less digits than its factorization.

660780536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488775 (or 488758 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 660780536 is about 25705.6518298992. The cubic root of 660780536 is about 871.0018563857.

The spelling of 660780536 in words is "six hundred sixty million, seven hundred eighty thousand, five hundred thirty-six".