3212561660 has 48 divisors (see below), whose sum is σ = 8411074560. Its totient is φ = 1001317440.

The previous prime is 3212561659. The next prime is 3212561669. The reversal of 3212561660 is 661652123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3212561669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1041500 + ... + 1044579.

It is an arithmetic number, because the mean of its divisors is an integer number (175230720).

Almost surely, 2^3212561660 is an apocalyptic number.

It is an amenable number.

3212561660 is an abundant number, since it is smaller than the sum of its proper divisors (5198512900).

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

3212561660 is a wasteful number, since it uses less digits than its factorization.

3212561660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086106 (or 2086104 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 3212561660 is about 56679.4641823650. The cubic root of 3212561660 is about 1475.5383131381.

The spelling of 3212561660 in words is "three billion, two hundred twelve million, five hundred sixty-one thousand, six hundred sixty".