266667401 has 16 divisors (see below), whose sum is σ = 358044288. Its totient is φ = 191808000.

The previous prime is 266667397. The next prime is 266667421. The reversal of 266667401 is 104766662.

266667401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 266667401 - 2² = 266667397 is a prime.

It is a super-2 number, since 2×266667401² = 142223005512189602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266667421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132200 + ... + 134201.

It is an arithmetic number, because the mean of its divisors is an integer number (22377768).

Almost surely, 2^266667401 is an apocalyptic number.

It is an amenable number.

266667401 is a deficient number, since it is larger than the sum of its proper divisors (91376887).

266667401 is a wasteful number, since it uses less digits than its factorization.

266667401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266432.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 266667401 is about 16329.9541028136. The cubic root of 266667401 is about 643.6601805624.

The spelling of 266667401 in words is "two hundred sixty-six million, six hundred sixty-seven thousand, four hundred one".