266778132 has 24 divisors (see below), whose sum is σ = 632688672. Its totient is φ = 87468000.

The previous prime is 266778131. The next prime is 266778133. The reversal of 266778132 is 231877662.

It is an interprime number because it is at equal distance from previous prime (266778131) and next prime (266778133).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266778131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181494 + ... + 182957.

It is an arithmetic number, because the mean of its divisors is an integer number (26362028).

Almost surely, 2^266778132 is an apocalyptic number.

It is an amenable number.

266778132 is an abundant number, since it is smaller than the sum of its proper divisors (365910540).

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

266778132 is a wasteful number, since it uses less digits than its factorization.

266778132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364519 (or 364517 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 266778132 is about 16333.3441768671. The cubic root of 266778132 is about 643.7492594078.

The spelling of 266778132 in words is "two hundred sixty-six million, seven hundred seventy-eight thousand, one hundred thirty-two".