266878516 has 12 divisors (see below), whose sum is σ = 468292132. Its totient is φ = 133080768.

The previous prime is 266878463. The next prime is 266878517. The reversal of 266878516 is 615878662.

It can be written as a sum of positive squares in 2 ways, for example, as 65124900 + 201753616 = 8070^2 + 14204^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 266878516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266878517) 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, 87945 + ... + 90928.

Almost surely, 2^266878516 is an apocalyptic number.

It is an amenable number.

266878516 is a deficient number, since it is larger than the sum of its proper divisors (201413616).

266878516 is a wasteful number, since it uses less digits than its factorization.

266878516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179250 (or 179248 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 266878516 is about 16336.4168653962. The cubic root of 266878516 is about 643.8299931890.

The spelling of 266878516 in words is "two hundred sixty-six million, eight hundred seventy-eight thousand, five hundred sixteen".