8661245684 has 72 divisors (see below), whose sum is σ = 19987601760. Its totient is φ = 3246070464.

The previous prime is 8661245669. The next prime is 8661245687. The reversal of 8661245684 is 4865421668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661245687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41042 + ... + 137865.

It is an arithmetic number, because the mean of its divisors is an integer number (277605580).

Almost surely, 2^8661245684 is an apocalyptic number.

It is an amenable number.

8661245684 is an abundant number, since it is smaller than the sum of its proper divisors (11326356076).

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

8661245684 is a wasteful number, since it uses less digits than its factorization.

8661245684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178957 (or 178948 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 50.

The square root of 8661245684 is about 93065.8137234076. The cubic root of 8661245684 is about 2053.6516856028.

The spelling of 8661245684 in words is "eight billion, six hundred sixty-one million, two hundred forty-five thousand, six hundred eighty-four".