6651560660001 has 4 divisors (see below), whose sum is σ = 8868747546672. Its totient is φ = 4434373773332.

The previous prime is 6651560659927. The next prime is 6651560660009. The reversal of 6651560660001 is 1000660651566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6651560660001 - 2¹⁵ = 6651560627233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6651560660009) 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, 1108593443331 + ... + 1108593443336.

It is an arithmetic number, because the mean of its divisors is an integer number (2217186886668).

Almost surely, 2^{6651560660001} is an apocalyptic number.

It is an amenable number.

6651560660001 is a deficient number, since it is larger than the sum of its proper divisors (2217186886671).

6651560660001 is a wasteful number, since it uses less digits than its factorization.

6651560660001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217186886670.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 6651560660001 in words is "six trillion, six hundred fifty-one billion, five hundred sixty million, six hundred sixty thousand, one".