616666144 has 24 divisors (see below), whose sum is σ = 1214652348. Its totient is φ = 308183040.

The previous prime is 616666093. The next prime is 616666159. The reversal of 616666144 is 441666616.

It can be written as a sum of positive squares in 2 ways, for example, as 580810000 + 35856144 = 24100^2 + 5988^2 .

It is a junction number, because it is equal to n+sod(n) for n = 616666097 and 616666106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94144 + ... + 100480.

Almost surely, 2^616666144 is an apocalyptic number.

It is an amenable number.

616666144 is a deficient number, since it is larger than the sum of its proper divisors (597986204).

616666144 is a wasteful number, since it uses less digits than its factorization.

616666144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9388 (or 9380 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 616666144 is about 24832.7635191897. The cubic root of 616666144 is about 851.1707714397.

The spelling of 616666144 in words is "six hundred sixteen million, six hundred sixty-six thousand, one hundred forty-four".