65566541161451 has 4 divisors (see below), whose sum is σ = 71527135812504. Its totient is φ = 59605946510400.

The previous prime is 65566541161421. The next prime is 65566541161453. The reversal of 65566541161451 is 15416114566556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65566541161451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65566541161453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2980297325510 + ... + 2980297325531.

It is an arithmetic number, because the mean of its divisors is an integer number (17881783953126).

Almost surely, 2^{65566541161451} is an apocalyptic number.

65566541161451 is a deficient number, since it is larger than the sum of its proper divisors (5960594651053).

65566541161451 is a wasteful number, since it uses less digits than its factorization.

65566541161451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960594651052.

The product of its digits is 12960000, while the sum is 56.

The spelling of 65566541161451 in words is "sixty-five trillion, five hundred sixty-six billion, five hundred forty-one million, one hundred sixty-one thousand, four hundred fifty-one".