51660360 has 48 divisors (see below), whose sum is σ = 167897340. Its totient is φ = 13776000.

The previous prime is 51660359. The next prime is 51660361. The reversal of 51660360 is 6306615.

51660360 is a `hidden beast` number, since 51 + 6 + 603 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51660359) and next prime (51660361).

It can be written as a sum of positive squares in 2 ways, for example, as 46212804 + 5447556 = 6798^2 + 2334^2 .

It is not an unprimeable number, because it can be changed into a prime (51660361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71391 + ... + 72110.

Almost surely, 2^51660360 is an apocalyptic number.

It is an amenable number.

51660360 is an abundant number, since it is smaller than the sum of its proper divisors (116236980).

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

51660360 is a wasteful number, since it uses less digits than its factorization.

51660360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143518 (or 143511 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 51660360 is about 7187.5141738991. The cubic root of 51660360 is about 372.4367053095.

Adding to 51660360 its reverse (6306615), we get a palindrome (57966975).

The spelling of 51660360 in words is "fifty-one million, six hundred sixty thousand, three hundred sixty".