65661704002027 has 4 divisors (see below), whose sum is σ = 75041947430896. Its totient is φ = 56281460573160.

The previous prime is 65661704002007. The next prime is 65661704002039. The reversal of 65661704002027 is 72020040716656.

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

It is a cyclic number.

It is not a de Polignac number, because 65661704002027 - 2¹¹ = 65661703999979 is a prime.

It is a super-2 number, since 2×65661704002027² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65661704002007) 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, 4690121714424 + ... + 4690121714437.

It is an arithmetic number, because the mean of its divisors is an integer number (18760486857724).

Almost surely, 2^{65661704002027} is an apocalyptic number.

65661704002027 is a deficient number, since it is larger than the sum of its proper divisors (9380243428869).

65661704002027 is an equidigital number, since it uses as much as digits as its factorization.

65661704002027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9380243428868.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 65661704002027 in words is "sixty-five trillion, six hundred sixty-one billion, seven hundred four million, two thousand, twenty-seven".