667376531266655 has 32 divisors (see below), whose sum is σ = 921459939408000. Its totient is φ = 454529659963392.

The previous prime is 667376531266573. The next prime is 667376531266663. The reversal of 667376531266655 is 556662135673766.

It is a cyclic number.

It is not a de Polignac number, because 667376531266655 - 2²⁸ = 667376262831199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78965291 + ... + 87007299.

It is an arithmetic number, because the mean of its divisors is an integer number (28795623106500).

Almost surely, 2^{667376531266655} is an apocalyptic number.

667376531266655 is a deficient number, since it is larger than the sum of its proper divisors (254083408141345).

667376531266655 is a wasteful number, since it uses less digits than its factorization.

667376531266655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058083.

The product of its digits is 5143824000, while the sum is 74.

The spelling of 667376531266655 in words is "six hundred sixty-seven trillion, three hundred seventy-six billion, five hundred thirty-one million, two hundred sixty-six thousand, six hundred fifty-five".