6661010515056 has 20 divisors (see below), whose sum is σ = 17207610497352. Its totient is φ = 2220336838336.

The previous prime is 6661010515051. The next prime is 6661010515079. The reversal of 6661010515056 is 6505150101666.

It is a super-2 number, since 2×6661010515056² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6661010514999 and 6661010515017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661010515051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69385526151 + ... + 69385526246.

Almost surely, 2^{6661010515056} is an apocalyptic number.

It is an amenable number.

6661010515056 is an abundant number, since it is smaller than the sum of its proper divisors (10546599982296).

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

6661010515056 is a wasteful number, since it uses less digits than its factorization.

6661010515056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138771052408 (or 138771052402 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 6661010515056 in words is "six trillion, six hundred sixty-one billion, ten million, five hundred fifteen thousand, fifty-six".