266666624 has 192 divisors, whose sum is σ = 681284520. Its totient is φ = 103219200.

The previous prime is 266666581. The next prime is 266666657. The reversal of 266666624 is 426666662.

266666624 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 121705024 + 144961600 = 11032^2 + 12040^2 .

It is a super-2 number, since 2×266666624² = 142222176711114752, which contains 22 as substring.

Its product of digits (746496) is a multiple of the sum of its prime divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4371554 + ... + 4371614.

Almost surely, 2^266666624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266666624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340642260).

266666624 is an abundant number, since it is smaller than the sum of its proper divisors (414617896).

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

266666624 is a wasteful number, since it uses less digits than its factorization.

266666624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 128 counting only the distinct ones).

The product of its digits is 746496, while the sum is 44.

The square root of 266666624 is about 16329.9303121599. The cubic root of 266666624 is about 643.6595554086.

The spelling of 266666624 in words is "two hundred sixty-six million, six hundred sixty-six thousand, six hundred twenty-four".