266031401 has 4 divisors (see below), whose sum is σ = 266939652. Its totient is φ = 265123152.

The previous prime is 266031397. The next prime is 266031439. The reversal of 266031401 is 104130662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118287376 + 147744025 = 10876^2 + 12155^2 .

It is a cyclic number.

It is not a de Polignac number, because 266031401 - 2² = 266031397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266031461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453686 + ... + 454271.

It is an arithmetic number, because the mean of its divisors is an integer number (66734913).

Almost surely, 2^266031401 is an apocalyptic number.

It is an amenable number.

266031401 is a deficient number, since it is larger than the sum of its proper divisors (908251).

266031401 is an equidigital number, since it uses as much as digits as its factorization.

266031401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908250.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 266031401 is about 16310.4690613115. The cubic root of 266031401 is about 643.1480647810.

The spelling of 266031401 in words is "two hundred sixty-six million, thirty-one thousand, four hundred one".