266401926 has 128 divisors (see below), whose sum is σ = 727680000. Its totient is φ = 72013536.

The previous prime is 266401873. The next prime is 266401937. The reversal of 266401926 is 629104662.

266401926 is a `hidden beast` number, since 2 + 6 + 640 + 1 + 9 + 2 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 351540 + ... + 352296.

It is an arithmetic number, because the mean of its divisors is an integer number (5685000).

Almost surely, 2^266401926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266401926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363840000).

266401926 is an abundant number, since it is smaller than the sum of its proper divisors (461278074).

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

266401926 is a wasteful number, since it uses less digits than its factorization.

266401926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 266401926 is about 16321.8236113493. The cubic root of 266401926 is about 643.4465156237.

The spelling of 266401926 in words is "two hundred sixty-six million, four hundred one thousand, nine hundred twenty-six".