266941389 has 16 divisors (see below), whose sum is σ = 418146624. Its totient is φ = 149337600.

The previous prime is 266941387. The next prime is 266941391. The reversal of 266941389 is 983149662.

It is an interprime number because it is at equal distance from previous prime (266941387) and next prime (266941391).

It is not a de Polignac number, because 266941389 - 2¹ = 266941387 is a prime.

It is a super-2 number, since 2×266941389² = 142515410322498642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266941387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310692 + ... + 311549.

It is an arithmetic number, because the mean of its divisors is an integer number (26134164).

Almost surely, 2^266941389 is an apocalyptic number.

It is an amenable number.

266941389 is a deficient number, since it is larger than the sum of its proper divisors (151205235).

266941389 is a wasteful number, since it uses less digits than its factorization.

266941389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622268.

The product of its digits is 559872, while the sum is 48.

The square root of 266941389 is about 16338.3410724590. The cubic root of 266941389 is about 643.8805484570.

The spelling of 266941389 in words is "two hundred sixty-six million, nine hundred forty-one thousand, three hundred eighty-nine".