26666001 has 12 divisors (see below), whose sum is σ = 38599860. Its totient is φ = 17739360.

The previous prime is 26665999. The next prime is 26666021. The reversal of 26666001 is 10066662.

It can be written as a sum of positive squares in 2 ways, for example, as 22467600 + 4198401 = 4740^2 + 2049^2 .

It is not a de Polignac number, because 26666001 - 2¹ = 26665999 is a prime.

It is a super-2 number, since 2×26666001² = 1422151218664002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26666021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1671 + ... + 7491.

It is an arithmetic number, because the mean of its divisors is an integer number (3216655).

Almost surely, 2^26666001 is an apocalyptic number.

It is an amenable number.

26666001 is a deficient number, since it is larger than the sum of its proper divisors (11933859).

26666001 is a wasteful number, since it uses less digits than its factorization.

26666001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336 (or 6333 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 26666001 is about 5163.9133416431. The cubic root of 26666001 is about 298.7578304817.

The spelling of 26666001 in words is "twenty-six million, six hundred sixty-six thousand, one".