26660231 has 4 divisors (see below), whose sum is σ = 28711032. Its totient is φ = 24609432.

The previous prime is 26660213. The next prime is 26660237. The reversal of 26660231 is 13206662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26660231 is a prime.

It is a super-2 number, since 2×26660231² = 1421535833946722, which contains 22 as substring.

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 26660231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26660237) 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, 1025381 + ... + 1025406.

It is an arithmetic number, because the mean of its divisors is an integer number (7177758).

Almost surely, 2^26660231 is an apocalyptic number.

26660231 is a deficient number, since it is larger than the sum of its proper divisors (2050801).

26660231 is a wasteful number, since it uses less digits than its factorization.

26660231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050800.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 26660231 is about 5163.3546265969. The cubic root of 26660231 is about 298.7362804808.

Adding to 26660231 its reverse (13206662), we get a palindrome (39866893).

The spelling of 26660231 in words is "twenty-six million, six hundred sixty thousand, two hundred thirty-one".