266120140 has 96 divisors (see below), whose sum is σ = 662840640. Its totient is φ = 89210880.

The previous prime is 266120119. The next prime is 266120177. The reversal of 266120140 is 41021662.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345676 + ... + 346444.

It is an arithmetic number, because the mean of its divisors is an integer number (6904590).

Almost surely, 2^266120140 is an apocalyptic number.

266120140 is a gapful number since it is divisible by the number (20) 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 266120140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331420320).

266120140 is an abundant number, since it is smaller than the sum of its proper divisors (396720500).

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

266120140 is a wasteful number, since it uses less digits than its factorization.

266120140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 266120140 is about 16313.1891425313. The cubic root of 266120140 is about 643.2195675827.

It can be divided in two parts, 2661 and 20140, that added together give a square (22801 = 151²).

The spelling of 266120140 in words is "two hundred sixty-six million, one hundred twenty thousand, one hundred forty".