26665121 has 8 divisors (see below), whose sum is σ = 31123200. Its totient is φ = 22369248.

The previous prime is 26665103. The next prime is 26665127. The reversal of 26665121 is 12156662.

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

It is a cyclic number.

It is not a de Polignac number, because 26665121 - 2¹⁰ = 26664097 is a prime.

It is a super-2 number, since 2×26665121² = 1422057355889282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26665127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40196 + ... + 40853.

It is an arithmetic number, because the mean of its divisors is an integer number (3890400).

Almost surely, 2^26665121 is an apocalyptic number.

It is an amenable number.

26665121 is a deficient number, since it is larger than the sum of its proper divisors (4458079).

26665121 is an equidigital number, since it uses as much as digits as its factorization.

26665121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81103.

The product of its digits is 4320, while the sum is 29.

The square root of 26665121 is about 5163.8281342430. The cubic root of 26665121 is about 298.7545440273.

The spelling of 26665121 in words is "twenty-six million, six hundred sixty-five thousand, one hundred twenty-one".