66635256654144 has 112 divisors (see below), whose sum is σ = 196450260733440. Its totient is φ = 22148829204480.

The previous prime is 66635256654143. The next prime is 66635256654167. The reversal of 66635256654144 is 44145665253666.

66635256654144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66635256654143) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 54010512 + ... + 55230479.

It is an arithmetic number, because the mean of its divisors is an integer number (1754020185120).

Almost surely, 2^{66635256654144} is an apocalyptic number.

66635256654144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66635256654144 is an abundant number, since it is smaller than the sum of its proper divisors (129815004079296).

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

66635256654144 is a wasteful number, since it uses less digits than its factorization.

66635256654144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109241365 (or 109241349 counting only the distinct ones).

The product of its digits is 373248000, while the sum is 63.

The spelling of 66635256654144 in words is "sixty-six trillion, six hundred thirty-five billion, two hundred fifty-six million, six hundred fifty-four thousand, one hundred forty-four".