667376531266505 has 8 divisors (see below), whose sum is σ = 800879501925000. Its totient is φ = 533882782076416.

The previous prime is 667376531266477. The next prime is 667376531266553. The reversal of 667376531266505 is 505662135673766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 336745841604496 + 330630689662009 = 18350636^2 + 18183253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667376531266505 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2305207880 + ... + 2305497369.

It is an arithmetic number, because the mean of its divisors is an integer number (100109937740625).

Almost surely, 2^{667376531266505} is an apocalyptic number.

It is an amenable number.

667376531266505 is a deficient number, since it is larger than the sum of its proper divisors (133502970658495).

667376531266505 is a wasteful number, since it uses less digits than its factorization.

667376531266505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610734203.

The product of its (nonzero) digits is 857304000, while the sum is 68.

The spelling of 667376531266505 in words is "six hundred sixty-seven trillion, three hundred seventy-six billion, five hundred thirty-one million, two hundred sixty-six thousand, five hundred five".