266789493 has 12 divisors (see below), whose sum is σ = 385572460. Its totient is φ = 177762816.

The previous prime is 266789461. The next prime is 266789513. The reversal of 266789493 is 394987662.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2304324 + 264485169 = 1518^2 + 16263^2 .

It is not a de Polignac number, because 266789493 - 2⁵ = 266789461 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 (266789093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12003 + ... + 26031.

Almost surely, 2^266789493 is an apocalyptic number.

It is an amenable number.

266789493 is a deficient number, since it is larger than the sum of its proper divisors (118782967).

266789493 is a wasteful number, since it uses less digits than its factorization.

266789493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16148 (or 16145 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 266789493 is about 16333.6919586479. The cubic root of 266789493 is about 643.7583975025.

The spelling of 266789493 in words is "two hundred sixty-six million, seven hundred eighty-nine thousand, four hundred ninety-three".