65666777520011 has 8 divisors (see below), whose sum is σ = 67204661988240. Its totient is φ = 64146672063232.

The previous prime is 65666777519977. The next prime is 65666777520053. The reversal of 65666777520011 is 11002577766656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65666777520011 - 2¹⁸ = 65666777257867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65666777510011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4444745390 + ... + 4444760163.

It is an arithmetic number, because the mean of its divisors is an integer number (8400582748530).

Almost surely, 2^{65666777520011} is an apocalyptic number.

65666777520011 is a deficient number, since it is larger than the sum of its proper divisors (1537884468229).

65666777520011 is an equidigital number, since it uses as much as digits as its factorization.

65666777520011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8889505725.

The product of its (nonzero) digits is 22226400, while the sum is 59.

The spelling of 65666777520011 in words is "sixty-five trillion, six hundred sixty-six billion, seven hundred seventy-seven million, five hundred twenty thousand, eleven".