266642042426 has 8 divisors (see below), whose sum is σ = 399970097940. Its totient is φ = 133318676448.

The previous prime is 266642042393. The next prime is 266642042437. The reversal of 266642042426 is 624240246662.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 259860355225 + 6781687201 = 509765^2 + 82351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×266642042426³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026611 + ... + 1259846.

Almost surely, 2^266642042426 is an apocalyptic number.

266642042426 is a deficient number, since it is larger than the sum of its proper divisors (133328055514).

266642042426 is a wasteful number, since it uses less digits than its factorization.

266642042426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344768.

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 266642042426 in words is "two hundred sixty-six billion, six hundred forty-two million, forty-two thousand, four hundred twenty-six".