667565612555 has 8 divisors (see below), whose sum is σ = 802616317344. Its totient is φ = 533027435200.

The previous prime is 667565612501. The next prime is 667565612563. The reversal of 667565612555 is 555216565766.

667565612555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 667565612555 - 2⁸ = 667565612299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667565612494 and 667565612503.

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, 128128991 + ... + 128134200.

It is an arithmetic number, because the mean of its divisors is an integer number (100327039668).

Almost surely, 2^667565612555 is an apocalyptic number.

667565612555 is a deficient number, since it is larger than the sum of its proper divisors (135050704789).

667565612555 is a wasteful number, since it uses less digits than its factorization.

667565612555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256263717.

The product of its digits is 56700000, while the sum is 59.

The spelling of 667565612555 in words is "six hundred sixty-seven billion, five hundred sixty-five million, six hundred twelve thousand, five hundred fifty-five".