6661559462975 has 12 divisors (see below), whose sum is σ = 8261889810120. Its totient is φ = 5328243650400.

The previous prime is 6661559462951. The next prime is 6661559462977. The reversal of 6661559462975 is 5792649551666.

It is not a de Polignac number, because 6661559462975 - 2¹⁶ = 6661559397439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6661559462899 and 6661559462908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661559462977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24962621 + ... + 25228070.

It is an arithmetic number, because the mean of its divisors is an integer number (688490817510).

Almost surely, 2^{6661559462975} is an apocalyptic number.

6661559462975 is a deficient number, since it is larger than the sum of its proper divisors (1600330347145).

6661559462975 is a wasteful number, since it uses less digits than its factorization.

6661559462975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50196010 (or 50196005 counting only the distinct ones).

The product of its digits is 734832000, while the sum is 71.

The spelling of 6661559462975 in words is "six trillion, six hundred sixty-one billion, five hundred fifty-nine million, four hundred sixty-two thousand, nine hundred seventy-five".