26604661 has 2 divisors, whose sum is σ = 26604662. Its totient is φ = 26604660.

The previous prime is 26604637. The next prime is 26604673. The reversal of 26604661 is 16640662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 1454436 = 5015^2 + 1206^2 .

It is a cyclic number.

It is not a de Polignac number, because 26604661 - 2¹³ = 26596469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26605661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13302330 + 13302331.

It is an arithmetic number, because the mean of its divisors is an integer number (13302331).

Almost surely, 2^26604661 is an apocalyptic number.

It is an amenable number.

26604661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26604661 is an equidigital number, since it uses as much as digits as its factorization.

26604661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 26604661 is about 5157.9706280668. The cubic root of 26604661 is about 298.5285763218.

The spelling of 26604661 in words is "twenty-six million, six hundred four thousand, six hundred sixty-one".