266619242 has 4 divisors (see below), whose sum is σ = 399928866. Its totient is φ = 133309620.

The previous prime is 266619239. The next prime is 266619257. The reversal of 266619242 is 242916662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 257249521 + 9369721 = 16039^2 + 3061^2 .

It is a junction number, because it is equal to n+sod(n) for n = 266619196 and 266619205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66654809 + ... + 66654812.

Almost surely, 2^266619242 is an apocalyptic number.

266619242 is a deficient number, since it is larger than the sum of its proper divisors (133309624).

266619242 is a wasteful number, since it uses less digits than its factorization.

266619242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133309623.

The product of its digits is 62208, while the sum is 38.

The square root of 266619242 is about 16328.4794760566. The cubic root of 266619242 is about 643.6214307980.

The spelling of 266619242 in words is "two hundred sixty-six million, six hundred nineteen thousand, two hundred forty-two".