661352249484 has 18 divisors (see below), whose sum is σ = 1671751519620. Its totient is φ = 220450749816.

The previous prime is 661352249473. The next prime is 661352249497. The reversal of 661352249484 is 484942253166.

661352249484 is a `hidden beast` number, since 6 + 6 + 1 + 352 + 249 + 48 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 661352249484.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9185447874 + ... + 9185447945.

Almost surely, 2^661352249484 is an apocalyptic number.

It is an amenable number.

661352249484 is an abundant number, since it is smaller than the sum of its proper divisors (1010399270136).

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

661352249484 is a wasteful number, since it uses less digits than its factorization.

661352249484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18370895829 (or 18370895824 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The spelling of 661352249484 in words is "six hundred sixty-one billion, three hundred fifty-two million, two hundred forty-nine thousand, four hundred eighty-four".