616633660666540 has 24 divisors (see below), whose sum is σ = 1412651658982032. Its totient is φ = 224230422060480.

The previous prime is 616633660666501. The next prime is 616633660666609. The reversal of 616633660666540 is 45666066336616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401440137659 + ... + 1401440138098.

It is an arithmetic number, because the mean of its divisors is an integer number (58860485790918).

Almost surely, 2^{616633660666540} is an apocalyptic number.

It is an amenable number.

616633660666540 is an abundant number, since it is smaller than the sum of its proper divisors (796017998315492).

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

616633660666540 is a wasteful number, since it uses less digits than its factorization.

616633660666540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802880275777 (or 2802880275775 counting only the distinct ones).

The product of its (nonzero) digits is 302330880, while the sum is 64.

The spelling of 616633660666540 in words is "six hundred sixteen trillion, six hundred thirty-three billion, six hundred sixty million, six hundred sixty-six thousand, five hundred forty".