266640036 has 96 divisors (see below), whose sum is σ = 734106240. Its totient is φ = 74532864.

The previous prime is 266640001. The next prime is 266640037. The reversal of 266640036 is 630046662.

It is a junction number, because it is equal to n+sod(n) for n = 266639979 and 266640006.

It is not an unprimeable number, because it can be changed into a prime (266640037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75175 + ... + 78641.

It is an arithmetic number, because the mean of its divisors is an integer number (7646940).

Almost surely, 2^266640036 is an apocalyptic number.

266640036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266640036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367053120).

266640036 is an abundant number, since it is smaller than the sum of its proper divisors (467466204).

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

266640036 is a wasteful number, since it uses less digits than its factorization.

266640036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533 (or 3531 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 266640036 is about 16329.1162038856. The cubic root of 266640036 is about 643.6381626688.

Adding to 266640036 its reverse (630046662), we get a palindrome (896686698).

The spelling of 266640036 in words is "two hundred sixty-six million, six hundred forty thousand, thirty-six".