266954096640 has 480 divisors, whose sum is σ = 1065085830144. Its totient is φ = 55467048960.

The previous prime is 266954096623. The next prime is 266954096653. The reversal of 266954096640 is 46690459662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

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, 18916467 + ... + 18930573.

Almost surely, 2^266954096640 is an apocalyptic number.

266954096640 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 266954096640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532542915072).

266954096640 is an abundant number, since it is smaller than the sum of its proper divisors (798131733504).

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

266954096640 is a wasteful number, since it uses less digits than its factorization.

266954096640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14161 (or 14135 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 266954096640 in words is "two hundred sixty-six billion, nine hundred fifty-four million, ninety-six thousand, six hundred forty".