266890067668 has 24 divisors (see below), whose sum is σ = 534841356672. Its totient is φ = 114154053024.

The previous prime is 266890067663. The next prime is 266890067783. The reversal of 266890067668 is 866760098662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266890067663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9460855 + ... + 9489022.

It is an arithmetic number, because the mean of its divisors is an integer number (22285056528).

Almost surely, 2^266890067668 is an apocalyptic number.

266890067668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

266890067668 is an abundant number, since it is smaller than the sum of its proper divisors (267951289004).

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

266890067668 is a wasteful number, since it uses less digits than its factorization.

266890067668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18950391 (or 18950389 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 266890067668 in words is "two hundred sixty-six billion, eight hundred ninety million, sixty-seven thousand, six hundred sixty-eight".