266415366720 has 336 divisors, whose sum is σ = 900934106688. Its totient is φ = 66687959040.

The previous prime is 266415366691. The next prime is 266415366761. The reversal of 266415366720 is 27663514662.

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 266415366720.

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, 127898799 + ... + 127900881.

It is an arithmetic number, because the mean of its divisors is an integer number (2681351508).

Almost surely, 2^266415366720 is an apocalyptic number.

266415366720 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 266415366720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450467053344).

266415366720 is an abundant number, since it is smaller than the sum of its proper divisors (634518739968).

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

266415366720 is a wasteful number, since it uses less digits than its factorization.

266415366720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598 (or 2571 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 266415366720 in words is "two hundred sixty-six billion, four hundred fifteen million, three hundred sixty-six thousand, seven hundred twenty".