6666668147487 has 4 divisors (see below), whose sum is σ = 8888890863320. Its totient is φ = 4444445431656.

The previous prime is 6666668147483. The next prime is 6666668147507. The reversal of 6666668147487 is 7847418666666.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6666668147487 - 2² = 6666668147483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666668147483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111111357912 + ... + 1111111357917.

It is an arithmetic number, because the mean of its divisors is an integer number (2222222715830).

Almost surely, 2^{6666668147487} is an apocalyptic number.

6666668147487 is a deficient number, since it is larger than the sum of its proper divisors (2222222715833).

6666668147487 is a wasteful number, since it uses less digits than its factorization.

6666668147487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222222715832.

The product of its digits is 2341011456, while the sum is 75.

The spelling of 6666668147487 in words is "six trillion, six hundred sixty-six billion, six hundred sixty-eight million, one hundred forty-seven thousand, four hundred eighty-seven".