266666679 has 6 divisors (see below), whose sum is σ = 385185216. Its totient is φ = 177777780.

The previous prime is 266666671. The next prime is 266666723. The reversal of 266666679 is 976666662.

It is not a de Polignac number, because 266666679 - 2³ = 266666671 is a prime.

It is a super-2 number, since 2×266666679² = 142222235377778082, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266666671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14814807 + ... + 14814824.

It is an arithmetic number, because the mean of its divisors is an integer number (64197536).

Almost surely, 2^266666679 is an apocalyptic number.

266666679 is a deficient number, since it is larger than the sum of its proper divisors (118518537).

266666679 is a wasteful number, since it uses less digits than its factorization.

266666679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29629637 (or 29629634 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 54.

The square root of 266666679 is about 16329.9319961842. The cubic root of 266666679 is about 643.6595996602.

The spelling of 266666679 in words is "two hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-nine".