266666242 has 8 divisors (see below), whose sum is σ = 400467600. Its totient is φ = 133177044.

The previous prime is 266666219. The next prime is 266666243. The reversal of 266666242 is 242666662.

It is a happy number.

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

It is a super-2 number, since 2×266666242² = 142221769244805128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266666195 and 266666204.

It is not an unprimeable number, because it can be changed into a prime (266666243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75892 + ... + 79327.

It is an arithmetic number, because the mean of its divisors is an integer number (50058450).

Almost surely, 2^266666242 is an apocalyptic number.

266666242 is a deficient number, since it is larger than the sum of its proper divisors (133801358).

266666242 is a wasteful number, since it uses less digits than its factorization.

266666242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156080.

The product of its digits is 248832, while the sum is 40.

The square root of 266666242 is about 16329.9186158413. The cubic root of 266666242 is about 643.6592480609.

The spelling of 266666242 in words is "two hundred sixty-six million, six hundred sixty-six thousand, two hundred forty-two".