266545398436 has 6 divisors (see below), whose sum is σ = 466454447270. Its totient is φ = 133272699216.

The previous prime is 266545398389. The next prime is 266545398461. The reversal of 266545398436 is 634893545662.

It can be written as a sum of positive squares in only one way, i.e., 171773775936 + 94771622500 = 414456^2 + 307850^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33318174801 + ... + 33318174808.

Almost surely, 2^266545398436 is an apocalyptic number.

It is an amenable number.

266545398436 is a deficient number, since it is larger than the sum of its proper divisors (199909048834).

266545398436 is a wasteful number, since it uses less digits than its factorization.

266545398436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66636349613 (or 66636349611 counting only the distinct ones).

The product of its digits is 111974400, while the sum is 61.

The spelling of 266545398436 in words is "two hundred sixty-six billion, five hundred forty-five million, three hundred ninety-eight thousand, four hundred thirty-six".