26261661 has 4 divisors (see below), whose sum is σ = 35015552. Its totient is φ = 17507772.

The previous prime is 26261657. The next prime is 26261713. The reversal of 26261661 is 16616262.

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 not a de Polignac number, because 26261661 - 2² = 26261657 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 (26261611) 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, 4376941 + ... + 4376946.

It is an arithmetic number, because the mean of its divisors is an integer number (8753888).

Almost surely, 2^26261661 is an apocalyptic number.

It is an amenable number.

26261661 is a deficient number, since it is larger than the sum of its proper divisors (8753891).

26261661 is an equidigital number, since it uses as much as digits as its factorization.

26261661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8753890.

The product of its digits is 5184, while the sum is 30.

The square root of 26261661 is about 5124.6132537002. The cubic root of 26261661 is about 297.2400987892.

The spelling of 26261661 in words is "twenty-six million, two hundred sixty-one thousand, six hundred sixty-one".