26311661 has 8 divisors (see below), whose sum is σ = 26764800. Its totient is φ = 25861680.

The previous prime is 26311651. The next prime is 26311669. The reversal of 26311661 is 16611362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26311661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26311661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26311669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20795 + ... + 22023.

It is an arithmetic number, because the mean of its divisors is an integer number (3345600).

Almost surely, 2^26311661 is an apocalyptic number.

It is an amenable number.

26311661 is a deficient number, since it is larger than the sum of its proper divisors (453139).

26311661 is a wasteful number, since it uses less digits than its factorization.

26311661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579.

The product of its digits is 1296, while the sum is 26.

The square root of 26311661 is about 5129.4893508029. The cubic root of 26311661 is about 297.4286192704.

The spelling of 26311661 in words is "twenty-six million, three hundred eleven thousand, six hundred sixty-one".