66345545356554 has 16 divisors (see below), whose sum is σ = 133246283564160. Its totient is φ = 22022649643680.

The previous prime is 66345545356547. The next prime is 66345545356561. The reversal of 66345545356554 is 45565354554366.

66345545356554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66345545356547) and next prime (66345545356561).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23133033907 + ... + 23133036774.

It is an arithmetic number, because the mean of its divisors is an integer number (8327892722760).

Almost surely, 2^{66345545356554} is an apocalyptic number.

66345545356554 is an abundant number, since it is smaller than the sum of its proper divisors (66900738207606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66345545356554 is a wasteful number, since it uses less digits than its factorization.

66345545356554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46266070925.

The product of its digits is 1944000000, while the sum is 66.

The spelling of 66345545356554 in words is "sixty-six trillion, three hundred forty-five billion, five hundred forty-five million, three hundred fifty-six thousand, five hundred fifty-four".