266842572 has 72 divisors (see below), whose sum is σ = 652915536. Its totient is φ = 84811776.

The previous prime is 266842571. The next prime is 266842577. The reversal of 266842572 is 275248662.

It is not an unprimeable number, because it can be changed into a prime (266842571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1382508 + ... + 1382700.

Almost surely, 2^266842572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266842572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326457768).

266842572 is an abundant number, since it is smaller than the sum of its proper divisors (386072964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266842572 is a wasteful number, since it uses less digits than its factorization.

266842572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 364 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The square root of 266842572 is about 16335.3167095101. The cubic root of 266842572 is about 643.8010875722.

The spelling of 266842572 in words is "two hundred sixty-six million, eight hundred forty-two thousand, five hundred seventy-two".