2065693420657 has 4 divisors (see below), whose sum is σ = 2091841438720. Its totient is φ = 2039545402596.

The previous prime is 2065693420639. The next prime is 2065693420699. The reversal of 2065693420657 is 7560243965602.

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 2065693420657 - 2²³ = 2065685032049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2065693420598 and 2065693420607.

It is not an unprimeable number, because it can be changed into a prime (2065693420607) 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, 13074008913 + ... + 13074009070.

It is an arithmetic number, because the mean of its divisors is an integer number (522960359680).

Almost surely, 2^{2065693420657} is an apocalyptic number.

It is an amenable number.

2065693420657 is a deficient number, since it is larger than the sum of its proper divisors (26148018063).

2065693420657 is an equidigital number, since it uses as much as digits as its factorization.

2065693420657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26148018062.

The product of its (nonzero) digits is 16329600, while the sum is 55.

The spelling of 2065693420657 in words is "two trillion, sixty-five billion, six hundred ninety-three million, four hundred twenty thousand, six hundred fifty-seven".