26665742 has 8 divisors (see below), whose sum is σ = 40480776. Its totient is φ = 13172152.

The previous prime is 26665733. The next prime is 26665747. The reversal of 26665742 is 24756662.

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

It is a super-2 number, since 2×26665742² = 1422123592821128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26665696 and 26665705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26665747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80153 + ... + 80484.

It is an arithmetic number, because the mean of its divisors is an integer number (5060097).

Almost surely, 2^26665742 is an apocalyptic number.

26665742 is a deficient number, since it is larger than the sum of its proper divisors (13815034).

26665742 is a wasteful number, since it uses less digits than its factorization.

26665742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160722.

The product of its digits is 120960, while the sum is 38.

The square root of 26665742 is about 5163.8882637021. Note that the first 3 decimals coincide. The cubic root of 26665742 is about 298.7568632259.

The spelling of 26665742 in words is "twenty-six million, six hundred sixty-five thousand, seven hundred forty-two".