65891422765 has 16 divisors (see below), whose sum is σ = 95680991232. Its totient is φ = 42524884224.

The previous prime is 65891422739. The next prime is 65891422771. The reversal of 65891422765 is 56722419856.

It is a cyclic number.

It is not a de Polignac number, because 65891422765 - 2¹³ = 65891414573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55370349 + ... + 55371538.

It is an arithmetic number, because the mean of its divisors is an integer number (5980061952).

Almost surely, 2^65891422765 is an apocalyptic number.

It is an amenable number.

65891422765 is a deficient number, since it is larger than the sum of its proper divisors (29789568467).

65891422765 is a wasteful number, since it uses less digits than its factorization.

65891422765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110741916.

The product of its digits is 7257600, while the sum is 55.

The spelling of 65891422765 in words is "sixty-five billion, eight hundred ninety-one million, four hundred twenty-two thousand, seven hundred sixty-five".