616666544 has 20 divisors (see below), whose sum is σ = 1286698896. Its totient is φ = 284615232.

The previous prime is 616666447. The next prime is 616666549. The reversal of 616666544 is 445666616.

It is a junction number, because it is equal to n+sod(n) for n = 616666495 and 616666504.

It is not an unprimeable number, because it can be changed into a prime (616666549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482164 + ... + 1482579.

Almost surely, 2^616666544 is an apocalyptic number.

It is an amenable number.

616666544 is an abundant number, since it is smaller than the sum of its proper divisors (670032352).

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

616666544 is a wasteful number, since it uses less digits than its factorization.

616666544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964764 (or 2964758 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The square root of 616666544 is about 24832.7715730645. The cubic root of 616666544 is about 851.1709554767.

The spelling of 616666544 in words is "six hundred sixteen million, six hundred sixty-six thousand, five hundred forty-four".