660131332 has 18 divisors (see below), whose sum is σ = 1343839182. Its totient is φ = 282913344.

The previous prime is 660131327. The next prime is 660131363. The reversal of 660131332 is 233131066.

It can be written as a sum of positive squares in only one way, i.e., 537497856 + 122633476 = 23184^2 + 11074^2 .

It is a junction number, because it is equal to n+sod(n) for n = 660131297 and 660131306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1683813 + ... + 1684204.

Almost surely, 2^660131332 is an apocalyptic number.

It is an amenable number.

660131332 is an abundant number, since it is smaller than the sum of its proper divisors (683707850).

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

660131332 is a wasteful number, since it uses less digits than its factorization.

660131332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368035 (or 3368026 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 660131332 is about 25693.0210757708. The cubic root of 660131332 is about 870.7165154678.

Adding to 660131332 its reverse (233131066), we get a palindrome (893262398).

The spelling of 660131332 in words is "six hundred sixty million, one hundred thirty-one thousand, three hundred thirty-two".