667614126213547 has 4 divisors (see below), whose sum is σ = 667614281017320. Its totient is φ = 667613971409776.

The previous prime is 667614126213511. The next prime is 667614126213557. The reversal of 667614126213547 is 745312621416766.

It is a happy number.

667614126213547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 667614126213547 - 2³⁹ = 667064370399659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667614126213557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70741897 + ... + 79621882.

It is an arithmetic number, because the mean of its divisors is an integer number (166903570254330).

Almost surely, 2^{667614126213547} is an apocalyptic number.

667614126213547 is a deficient number, since it is larger than the sum of its proper divisors (154803773).

667614126213547 is a wasteful number, since it uses less digits than its factorization.

667614126213547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154803772.

The product of its digits is 60963840, while the sum is 61.

The spelling of 667614126213547 in words is "six hundred sixty-seven trillion, six hundred fourteen billion, one hundred twenty-six million, two hundred thirteen thousand, five hundred forty-seven".