65766601027561 has 16 divisors (see below), whose sum is σ = 75734814210048. Its totient is φ = 55943036049600.

The previous prime is 65766601027559. The next prime is 65766601027591. The reversal of 65766601027561 is 16572010666756.

It is not a de Polignac number, because 65766601027561 - 2¹ = 65766601027559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65766601027496 and 65766601027505.

It is not an unprimeable number, because it can be changed into a prime (65766601027591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57857170 + ... + 58982923.

It is an arithmetic number, because the mean of its divisors is an integer number (4733425888128).

Almost surely, 2^{65766601027561} is an apocalyptic number.

It is an amenable number.

65766601027561 is a deficient number, since it is larger than the sum of its proper divisors (9968213182487).

65766601027561 is a wasteful number, since it uses less digits than its factorization.

65766601027561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116840712.

The product of its (nonzero) digits is 19051200, while the sum is 58.

The spelling of 65766601027561 in words is "sixty-five trillion, seven hundred sixty-six billion, six hundred one million, twenty-seven thousand, five hundred sixty-one".