266563401 has 8 divisors (see below), whose sum is σ = 382757760. Its totient is φ = 164038992.

The previous prime is 266563397. The next prime is 266563411. The reversal of 266563401 is 104365662.

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

It is not a de Polignac number, because 266563401 - 2² = 266563397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266563411) 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, 3417441 + ... + 3417518.

It is an arithmetic number, because the mean of its divisors is an integer number (47844720).

Almost surely, 2^266563401 is an apocalyptic number.

It is an amenable number.

266563401 is a deficient number, since it is larger than the sum of its proper divisors (116194359).

266563401 is a wasteful number, since it uses less digits than its factorization.

266563401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6834975.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 266563401 is about 16326.7694600003. The cubic root of 266563401 is about 643.5764940892.

It can be divided in two parts, 2665 and 63401, that added together give a palindrome (66066).

The spelling of 266563401 in words is "two hundred sixty-six million, five hundred sixty-three thousand, four hundred one".