266770489 has 4 divisors (see below), whose sum is σ = 266927220. Its totient is φ = 266613760.

The previous prime is 266770487. The next prime is 266770499. The reversal of 266770489 is 984077662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984077662 = 2 ⋅492038831.

It can be written as a sum of positive squares in 2 ways, for example, as 197880489 + 68890000 = 14067^2 + 8300^2 .

It is a cyclic number.

It is not a de Polignac number, because 266770489 - 2¹ = 266770487 is a prime.

It is a super-3 number, since 3×266770489³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266770487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75784 + ... + 79225.

It is an arithmetic number, because the mean of its divisors is an integer number (66731805).

Almost surely, 2^266770489 is an apocalyptic number.

It is an amenable number.

266770489 is a deficient number, since it is larger than the sum of its proper divisors (156731).

266770489 is a wasteful number, since it uses less digits than its factorization.

266770489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156730.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 266770489 is about 16333.1102059589. The cubic root of 266770489 is about 643.7431116993.

The spelling of 266770489 in words is "two hundred sixty-six million, seven hundred seventy thousand, four hundred eighty-nine".