5531161660 has 12 divisors (see below), whose sum is σ = 11615439528. Its totient is φ = 2212464656.

The previous prime is 5531161651. The next prime is 5531161663. The reversal of 5531161660 is 661611355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5531161663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 138279022 + ... + 138279061.

It is an arithmetic number, because the mean of its divisors is an integer number (967953294).

Almost surely, 2^5531161660 is an apocalyptic number.

It is an amenable number.

5531161660 is an abundant number, since it is smaller than the sum of its proper divisors (6084277868).

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

5531161660 is a wasteful number, since it uses less digits than its factorization.

5531161660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276558092 (or 276558090 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 5531161660 is about 74371.7799975233. The cubic root of 5531161660 is about 1768.5015737198.

The spelling of 5531161660 in words is "five billion, five hundred thirty-one million, one hundred sixty-one thousand, six hundred sixty".