26664945 has 16 divisors (see below), whose sum is σ = 43657152. Its totient is φ = 13890240.

The previous prime is 26664943. The next prime is 26664947. The reversal of 26664945 is 54946662.

It is an interprime number because it is at equal distance from previous prime (26664943) and next prime (26664947).

It is not a de Polignac number, because 26664945 - 2¹ = 26664943 is a prime.

It is a super-2 number, since 2×26664945² = 1422038583706050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26664897 and 26664906.

It is not an unprimeable number, because it can be changed into a prime (26664941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20026 + ... + 21315.

It is an arithmetic number, because the mean of its divisors is an integer number (2728572).

Almost surely, 2^26664945 is an apocalyptic number.

It is an amenable number.

26664945 is a deficient number, since it is larger than the sum of its proper divisors (16992207).

26664945 is a wasteful number, since it uses less digits than its factorization.

26664945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41392.

The product of its digits is 311040, while the sum is 42.

The square root of 26664945 is about 5163.8110925943. The cubic root of 26664945 is about 298.7538867278.

The spelling of 26664945 in words is "twenty-six million, six hundred sixty-four thousand, nine hundred forty-five".