266378181600 has 288 divisors, whose sum is σ = 919574643456. Its totient is φ = 66745753600.

The previous prime is 266378181571. The next prime is 266378181623. The reversal of 266378181600 is 6181873662.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 266378181600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26392555 + ... + 26402645.

It is an arithmetic number, because the mean of its divisors is an integer number (3192967512).

Almost surely, 2^266378181600 is an apocalyptic number.

266378181600 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 266378181600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459787321728).

266378181600 is an abundant number, since it is smaller than the sum of its proper divisors (653196461856).

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

266378181600 is a wasteful number, since it uses less digits than its factorization.

266378181600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10778 (or 10765 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 266378181600 in words is "two hundred sixty-six billion, three hundred seventy-eight million, one hundred eighty-one thousand, six hundred".