266580212968 has 8 divisors (see below), whose sum is σ = 499837899330. Its totient is φ = 133290106480.

The previous prime is 266580212963. The next prime is 266580212971. The reversal of 266580212968 is 869212085662.

It can be written as a sum of positive squares in only one way, i.e., 262326303684 + 4253909284 = 512178^2 + 65222^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (266580212963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16661263303 + ... + 16661263318.

Almost surely, 2^266580212968 is an apocalyptic number.

It is an amenable number.

266580212968 is a deficient number, since it is larger than the sum of its proper divisors (233257686362).

266580212968 is a wasteful number, since it uses less digits than its factorization.

266580212968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33322526627 (or 33322526623 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 266580212968 in words is "two hundred sixty-six billion, five hundred eighty million, two hundred twelve thousand, nine hundred sixty-eight".