660539752 has 8 divisors (see below), whose sum is σ = 1238512050. Its totient is φ = 330269872.

The previous prime is 660539741. The next prime is 660539753. The reversal of 660539752 is 257935066.

660539752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 533887236 + 126652516 = 23106^2 + 11254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 660539699 and 660539708.

It is not an unprimeable number, because it can be changed into a prime (660539753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41283727 + ... + 41283742.

Almost surely, 2^660539752 is an apocalyptic number.

It is an amenable number.

660539752 is a deficient number, since it is larger than the sum of its proper divisors (577972298).

660539752 is a wasteful number, since it uses less digits than its factorization.

660539752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82567475 (or 82567471 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 43.

The square root of 660539752 is about 25700.9679195162. The cubic root of 660539752 is about 870.8960477858.

The spelling of 660539752 in words is "six hundred sixty million, five hundred thirty-nine thousand, seven hundred fifty-two".