65516667505 has 8 divisors (see below), whose sum is σ = 78759649152. Its totient is φ = 52320235248.

The previous prime is 65516667397. The next prime is 65516667511. The reversal of 65516667505 is 50576661556.

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 65516667505 - 2¹¹ = 65516665457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11634249 + ... + 11639878.

It is an arithmetic number, because the mean of its divisors is an integer number (9844956144).

Almost surely, 2^65516667505 is an apocalyptic number.

It is an amenable number.

65516667505 is a deficient number, since it is larger than the sum of its proper divisors (13242981647).

65516667505 is a wasteful number, since it uses less digits than its factorization.

65516667505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23274695.

The product of its (nonzero) digits is 5670000, while the sum is 52.

The spelling of 65516667505 in words is "sixty-five billion, five hundred sixteen million, six hundred sixty-seven thousand, five hundred five".