26640073 has 2 divisors, whose sum is σ = 26640074. Its totient is φ = 26640072.

The previous prime is 26640041. The next prime is 26640077. The reversal of 26640073 is 37004662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17073424 + 9566649 = 4132^2 + 3093^2 .

It is a cyclic number.

It is not a de Polignac number, because 26640073 - 2⁵ = 26640041 is a prime.

It is not a weakly prime, because it can be changed into another prime (26640077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13320036 + 13320037.

It is an arithmetic number, because the mean of its divisors is an integer number (13320037).

Almost surely, 2^26640073 is an apocalyptic number.

It is an amenable number.

26640073 is a deficient number, since it is larger than the sum of its proper divisors (1).

26640073 is an equidigital number, since it uses as much as digits as its factorization.

26640073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 26640073 is about 5161.4022319521. The cubic root of 26640073 is about 298.6609692514.

The spelling of 26640073 in words is "twenty-six million, six hundred forty thousand, seventy-three".