65660422045165 has 4 divisors (see below), whose sum is σ = 78792506454204. Its totient is φ = 52528337636128.

The previous prime is 65660422045139. The next prime is 65660422045181. The reversal of 65660422045165 is 56154022406656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46890680296329 + 18769741748836 = 6847677^2 + 4332406^2 .

It is a cyclic number.

It is not a de Polignac number, because 65660422045165 - 2¹⁹ = 65660421520877 is a prime.

It is a super-2 number, since 2×65660422045165² (a number of 28 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 6566042204512 + ... + 6566042204521.

It is an arithmetic number, because the mean of its divisors is an integer number (19698126613551).

Almost surely, 2^{65660422045165} is an apocalyptic number.

It is an amenable number.

65660422045165 is a deficient number, since it is larger than the sum of its proper divisors (13132084409039).

65660422045165 is a wasteful number, since it uses less digits than its factorization.

65660422045165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13132084409038.

The product of its (nonzero) digits is 10368000, while the sum is 52.

The spelling of 65660422045165 in words is "sixty-five trillion, six hundred sixty billion, four hundred twenty-two million, forty-five thousand, one hundred sixty-five".