661332010412 has 12 divisors (see below), whose sum is σ = 1157957631600. Its totient is φ = 330486972816.

The previous prime is 661332010411. The next prime is 661332010447. The reversal of 661332010412 is 214010233166.

It is not an unprimeable number, because it can be changed into a prime (661332010411) 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 3 ways as a sum of consecutive naturals, for example, 44749787 + ... + 44764562.

It is an arithmetic number, because the mean of its divisors is an integer number (96496469300).

Almost surely, 2^661332010412 is an apocalyptic number.

It is an amenable number.

661332010412 is a deficient number, since it is larger than the sum of its proper divisors (496625621188).

661332010412 is a wasteful number, since it uses less digits than its factorization.

661332010412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89516200 (or 89516198 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 661332010412 its reverse (214010233166), we get a palindrome (875342243578).

The spelling of 661332010412 in words is "six hundred sixty-one billion, three hundred thirty-two million, ten thousand, four hundred twelve".