66667746556488 has 128 divisors (see below), whose sum is σ = 212628029137920. Its totient is φ = 16913593186560.

The previous prime is 66667746556469. The next prime is 66667746556513. The reversal of 66667746556488 is 88465564776666.

66667746556488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×66667746556488³ (a number of 42 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (84).

It is a self number, because there is not a number n which added to its sum of digits gives 66667746556488.

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 31 ways as a sum of consecutive naturals, for example, 419404495 + ... + 419563422.

It is an arithmetic number, because the mean of its divisors is an integer number (1661156477640).

Almost surely, 2^{66667746556488} is an apocalyptic number.

It is an amenable number.

66667746556488 is an abundant number, since it is smaller than the sum of its proper divisors (145960282581432).

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

66667746556488 is a wasteful number, since it uses less digits than its factorization.

66667746556488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838967987 (or 838967983 counting only the distinct ones).

The product of its digits is 58525286400, while the sum is 84.

The spelling of 66667746556488 in words is "sixty-six trillion, six hundred sixty-seven billion, seven hundred forty-six million, five hundred fifty-six thousand, four hundred eighty-eight".