26640803 has 4 divisors (see below), whose sum is σ = 30446640. Its totient is φ = 22834968.

The previous prime is 26640791. The next prime is 26640827. The reversal of 26640803 is 30804662.

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

It is a cyclic number.

It is not a de Polignac number, because 26640803 - 2⁴ = 26640787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26640893) 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 3 ways as a sum of consecutive naturals, for example, 1902908 + ... + 1902921.

It is an arithmetic number, because the mean of its divisors is an integer number (7611660).

Almost surely, 2^26640803 is an apocalyptic number.

26640803 is a deficient number, since it is larger than the sum of its proper divisors (3805837).

26640803 is an equidigital number, since it uses as much as digits as its factorization.

26640803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805836.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 26640803 is about 5161.4729486843. The cubic root of 26640803 is about 298.6636972284.

It can be divided in two parts, 26 and 640803, that multiplied together give a triangular number (16660878 = T₅₇₇₂).

The spelling of 26640803 in words is "twenty-six million, six hundred forty thousand, eight hundred three".