26666431 has 8 divisors (see below), whose sum is σ = 29150928. Its totient is φ = 24192000.

The previous prime is 26666429. The next prime is 26666459. The reversal of 26666431 is 13466662.

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

It is a 10-Lehmer number, since φ(26666431) divides (26666431-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 26666431 - 2¹ = 26666429 is a prime.

It is a super-2 number, since 2×26666431² = 1422197084555522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26666411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3711 + ... + 8191.

It is an arithmetic number, because the mean of its divisors is an integer number (3643866).

Almost surely, 2^26666431 is an apocalyptic number.

26666431 is a deficient number, since it is larger than the sum of its proper divisors (2484497).

26666431 is a wasteful number, since it uses less digits than its factorization.

26666431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033.

The product of its digits is 31104, while the sum is 34.

The square root of 26666431 is about 5163.9549765659. The cubic root of 26666431 is about 298.7594363365.

The spelling of 26666431 in words is "twenty-six million, six hundred sixty-six thousand, four hundred thirty-one".