66614544205165 has 16 divisors (see below), whose sum is σ = 87214369683456. Its totient is φ = 48441454878400.

The previous prime is 66614544205129. The next prime is 66614544205177. The reversal of 66614544205165 is 56150244541666.

It is not a de Polignac number, because 66614544205165 - 2⁴³ = 57818451182957 is a prime.

It is a super-2 number, since 2×66614544205165² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

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, 68089402 + ... + 69060811.

It is an arithmetic number, because the mean of its divisors is an integer number (5450898105216).

Almost surely, 2^{66614544205165} is an apocalyptic number.

It is an amenable number.

66614544205165 is a deficient number, since it is larger than the sum of its proper divisors (20599825478291).

66614544205165 is a wasteful number, since it uses less digits than its factorization.

66614544205165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137159060.

The product of its (nonzero) digits is 20736000, while the sum is 55.

The spelling of 66614544205165 in words is "sixty-six trillion, six hundred fourteen billion, five hundred forty-four million, two hundred five thousand, one hundred sixty-five".