266695081328 has 40 divisors (see below), whose sum is σ = 559544041056. Its totient is φ = 122409964800.

The previous prime is 266695081243. The next prime is 266695081343. The reversal of 266695081328 is 823180596662.

It is a super-2 number, since 2×266695081328² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3504308 + ... + 3579603.

Almost surely, 2^266695081328 is an apocalyptic number.

It is an amenable number.

266695081328 is an abundant number, since it is smaller than the sum of its proper divisors (292848959728).

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

266695081328 is a wasteful number, since it uses less digits than its factorization.

266695081328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084113 (or 7084107 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 266695081328 in words is "two hundred sixty-six billion, six hundred ninety-five million, eighty-one thousand, three hundred twenty-eight".