266206222692 has 36 divisors (see below), whose sum is σ = 673037692236. Its totient is φ = 88718592000.

The previous prime is 266206222691. The next prime is 266206222837. The reversal of 266206222692 is 296222602662.

266206222692 is a `hidden beast` number, since 266 + 20 + 62 + 226 + 92 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 238774913316 + 27431309376 = 488646^2 + 165624^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (266206222691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507309 + ... + 888692.

It is an arithmetic number, because the mean of its divisors is an integer number (18695491451).

Almost surely, 2^266206222692 is an apocalyptic number.

It is an amenable number.

266206222692 is an abundant number, since it is smaller than the sum of its proper divisors (406831469544).

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

266206222692 is a wasteful number, since it uses less digits than its factorization.

266206222692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401308 (or 1401303 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 266206222692 in words is "two hundred sixty-six billion, two hundred six million, two hundred twenty-two thousand, six hundred ninety-two".