65883687661 has 4 divisors (see below), whose sum is σ = 71873113824. Its totient is φ = 59894261500.

The previous prime is 65883687641. The next prime is 65883687713. The reversal of 65883687661 is 16678638856.

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 65883687661 - 2¹⁹ = 65883163373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65883687593 and 65883687602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65883687631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2994713065 + ... + 2994713086.

It is an arithmetic number, because the mean of its divisors is an integer number (17968278456).

Almost surely, 2^65883687661 is an apocalyptic number.

It is an amenable number.

65883687661 is a deficient number, since it is larger than the sum of its proper divisors (5989426163).

65883687661 is a wasteful number, since it uses less digits than its factorization.

65883687661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989426162.

The product of its digits is 69672960, while the sum is 64.

The spelling of 65883687661 in words is "sixty-five billion, eight hundred eighty-three million, six hundred eighty-seven thousand, six hundred sixty-one".