66328364555545 has 16 divisors (see below), whose sum is σ = 83786070026880. Its totient is φ = 50268194784000.

The previous prime is 66328364555513. The next prime is 66328364555591. The reversal of 66328364555545 is 54555546382366.

It is not a de Polignac number, because 66328364555545 - 2⁵ = 66328364555513 is a prime.

It is a super-2 number, since 2×66328364555545² (a number of 28 digits) contains 22 as substring.

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, 9180861 + ... + 14729050.

It is an arithmetic number, because the mean of its divisors is an integer number (5236629376680).

Almost surely, 2^{66328364555545} is an apocalyptic number.

It is an amenable number.

66328364555545 is a deficient number, since it is larger than the sum of its proper divisors (17457705471335).

66328364555545 is a wasteful number, since it uses less digits than its factorization.

66328364555545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23939136.

The product of its digits is 1555200000, while the sum is 67.

The spelling of 66328364555545 in words is "sixty-six trillion, three hundred twenty-eight billion, three hundred sixty-four million, five hundred fifty-five thousand, five hundred forty-five".