266349431081 has 36 divisors (see below), whose sum is σ = 300201305712. Its totient is φ = 236194679424.

The previous prime is 266349431041. The next prime is 266349431099. The reversal of 266349431081 is 180134943662.

It is not a de Polignac number, because 266349431081 - 2¹⁰ = 266349430057 is a prime.

It is a super-2 number, since 2×266349431081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266349431011) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10230026 + ... + 10256028.

Almost surely, 2^266349431081 is an apocalyptic number.

It is an amenable number.

266349431081 is a deficient number, since it is larger than the sum of its proper divisors (33851874631).

266349431081 is a wasteful number, since it uses less digits than its factorization.

266349431081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26150 (or 26110 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 266349431081 in words is "two hundred sixty-six billion, three hundred forty-nine million, four hundred thirty-one thousand, eighty-one".