65612661717 has 8 divisors (see below), whose sum is σ = 87490653120. Its totient is φ = 43738222400.

The previous prime is 65612661689. The next prime is 65612661727. The reversal of 65612661717 is 71716621656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65612661717 - 2⁷ = 65612661589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65612661727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844617 + ... + 919022.

It is an arithmetic number, because the mean of its divisors is an integer number (10936331640).

Almost surely, 2^65612661717 is an apocalyptic number.

It is an amenable number.

65612661717 is a deficient number, since it is larger than the sum of its proper divisors (21877991403).

65612661717 is a wasteful number, since it uses less digits than its factorization.

65612661717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776043.

The product of its digits is 635040, while the sum is 48.

The spelling of 65612661717 in words is "sixty-five billion, six hundred twelve million, six hundred sixty-one thousand, seven hundred seventeen".