266320959648 has 48 divisors (see below), whose sum is σ = 700316993376. Its totient is φ = 88618164480.

The previous prime is 266320959587. The next prime is 266320959661. The reversal of 266320959648 is 846959023662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 266320959591 and 266320959600.

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, 2374411 + ... + 2484042.

It is an arithmetic number, because the mean of its divisors is an integer number (14589937362).

Almost surely, 2^266320959648 is an apocalyptic number.

It is an amenable number.

266320959648 is an abundant number, since it is smaller than the sum of its proper divisors (433996033728).

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

266320959648 is a wasteful number, since it uses less digits than its factorization.

266320959648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859037 (or 4859029 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 60.

The spelling of 266320959648 in words is "two hundred sixty-six billion, three hundred twenty million, nine hundred fifty-nine thousand, six hundred forty-eight".