266342421 has 8 divisors (see below), whose sum is σ = 366578944. Its totient is φ = 171833760.

The previous prime is 266342411. The next prime is 266342423. The reversal of 266342421 is 124243662.

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

It is not a de Polignac number, because 266342421 - 2¹⁵ = 266309653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266342423) 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 7 ways as a sum of consecutive naturals, for example, 1431856 + ... + 1432041.

It is an arithmetic number, because the mean of its divisors is an integer number (45822368).

Almost surely, 2^266342421 is an apocalyptic number.

It is an amenable number.

266342421 is a deficient number, since it is larger than the sum of its proper divisors (100236523).

266342421 is a wasteful number, since it uses less digits than its factorization.

266342421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863931.

The product of its digits is 13824, while the sum is 30.

The square root of 266342421 is about 16320.0006433823. Note that the first 3 decimals coincide. The cubic root of 266342421 is about 643.3986041382.

The spelling of 266342421 in words is "two hundred sixty-six million, three hundred forty-two thousand, four hundred twenty-one".