26031661 has 4 divisors (see below), whose sum is σ = 26871424. Its totient is φ = 25191900.

The previous prime is 26031659. The next prime is 26031667. The reversal of 26031661 is 16613062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26031661 - 2¹ = 26031659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26031667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419835 + ... + 419896.

It is an arithmetic number, because the mean of its divisors is an integer number (6717856).

Almost surely, 2^26031661 is an apocalyptic number.

It is an amenable number.

26031661 is a deficient number, since it is larger than the sum of its proper divisors (839763).

26031661 is an equidigital number, since it uses as much as digits as its factorization.

26031661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839762.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 26031661 is about 5102.1231854984. The cubic root of 26031661 is about 296.3698088166.

The spelling of 26031661 in words is "twenty-six million, thirty-one thousand, six hundred sixty-one".