266829966 has 48 divisors (see below), whose sum is σ = 628480944. Its totient is φ = 81326592.

The previous prime is 266829949. The next prime is 266829973. The reversal of 266829966 is 669928662.

It is a super-2 number, since 2×266829966² = 142396461511122312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19710 + ... + 30366.

It is an arithmetic number, because the mean of its divisors is an integer number (13093353).

Almost surely, 2^266829966 is an apocalyptic number.

266829966 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 266829966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314240472).

266829966 is an abundant number, since it is smaller than the sum of its proper divisors (361650978).

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

266829966 is a wasteful number, since it uses less digits than its factorization.

266829966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10785 (or 10782 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 266829966 is about 16334.9308538481. The cubic root of 266829966 is about 643.7909494044.

The spelling of 266829966 in words is "two hundred sixty-six million, eight hundred twenty-nine thousand, nine hundred sixty-six".