6660516560061 has 64 divisors (see below), whose sum is σ = 11178556928000. Its totient is φ = 3505233590208.

The previous prime is 6660516560023. The next prime is 6660516560069. The reversal of 6660516560061 is 1600656150666.

It is not a de Polignac number, because 6660516560061 - 2¹³ = 6660516551869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660516560069) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5305410 + ... + 6439596.

It is an arithmetic number, because the mean of its divisors is an integer number (174664952000).

Almost surely, 2^{6660516560061} is an apocalyptic number.

It is an amenable number.

6660516560061 is a deficient number, since it is larger than the sum of its proper divisors (4518040367939).

6660516560061 is a wasteful number, since it uses less digits than its factorization.

6660516560061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134663 (or 1134649 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 6660516560061 in words is "six trillion, six hundred sixty billion, five hundred sixteen million, five hundred sixty thousand, sixty-one".