616166566566 has 32 divisors (see below), whose sum is σ = 1255053616128. Its totient is φ = 201626940480.

The previous prime is 616166566541. The next prime is 616166566597. The reversal of 616166566566 is 665665661616.

It is a super-2 number, since 2×616166566566² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3004606 + ... + 3203121.

It is an arithmetic number, because the mean of its divisors is an integer number (39220425504).

Almost surely, 2^616166566566 is an apocalyptic number.

616166566566 is an abundant number, since it is smaller than the sum of its proper divisors (638887049562).

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

616166566566 is a wasteful number, since it uses less digits than its factorization.

616166566566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208036.

The product of its digits is 41990400, while the sum is 60.

The spelling of 616166566566 in words is "six hundred sixteen billion, one hundred sixty-six million, five hundred sixty-six thousand, five hundred sixty-six".