661102645302 has 96 divisors (see below), whose sum is σ = 1639972728576. Its totient is φ = 190516075200.

The previous prime is 661102645277. The next prime is 661102645339. The reversal of 661102645302 is 203546201166.

661102645302 is a `hidden beast` number, since 6 + 6 + 1 + 1 + 0 + 2 + 645 + 3 + 0 + 2 = 666.

661102645302 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368277 + ... + 1207407.

It is an arithmetic number, because the mean of its divisors is an integer number (17083049256).

Almost surely, 2^661102645302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661102645302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819986364288).

661102645302 is an abundant number, since it is smaller than the sum of its proper divisors (978870083274).

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

661102645302 is a wasteful number, since it uses less digits than its factorization.

661102645302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839346 (or 839343 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 661102645302 its reverse (203546201166), we get a palindrome (864648846468).

The spelling of 661102645302 in words is "six hundred sixty-one billion, one hundred two million, six hundred forty-five thousand, three hundred two".