266776146 has 96 divisors (see below), whose sum is σ = 732789120. Its totient is φ = 70056576.

The previous prime is 266776123. The next prime is 266776157. The reversal of 266776146 is 641677662.

It is a happy number.

266776146 is a `hidden beast` number, since 26 + 6 + 7 + 7 + 614 + 6 = 666.

It is a super-2 number, since 2×266776146² = 142339024149226632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1144846 + ... + 1145078.

It is an arithmetic number, because the mean of its divisors is an integer number (7633220).

Almost surely, 2^266776146 is an apocalyptic number.

266776146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 266776146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366394560).

266776146 is an abundant number, since it is smaller than the sum of its proper divisors (466012974).

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

266776146 is a wasteful number, since it uses less digits than its factorization.

266776146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 258 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 266776146 is about 16333.2833808760. The cubic root of 266776146 is about 643.7476619640.

It can be divided in two parts, 26677 and 6146, that added together give a palindrome (32823).

The spelling of 266776146 in words is "two hundred sixty-six million, seven hundred seventy-six thousand, one hundred forty-six".