266676666215 has 4 divisors (see below), whose sum is σ = 320011999464. Its totient is φ = 213341332968.

The previous prime is 266676666199. The next prime is 266676666227. The reversal of 266676666215 is 512666676662.

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 266676666215 - 2⁴ = 266676666199 is a prime.

It is a super-2 number, since 2×266676666215² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26667666617 + ... + 26667666626.

It is an arithmetic number, because the mean of its divisors is an integer number (80002999866).

Almost surely, 2^266676666215 is an apocalyptic number.

266676666215 is a deficient number, since it is larger than the sum of its proper divisors (53335333249).

266676666215 is an equidigital number, since it uses as much as digits as its factorization.

266676666215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53335333248.

The product of its digits is 39191040, while the sum is 59.

The spelling of 266676666215 in words is "two hundred sixty-six billion, six hundred seventy-six million, six hundred sixty-six thousand, two hundred fifteen".