26720555 has 16 divisors (see below), whose sum is σ = 34223520. Its totient is φ = 19968768.

The previous prime is 26720539. The next prime is 26720563. The reversal of 26720555 is 55502762.

It is a cyclic number.

It is not a de Polignac number, because 26720555 - 2⁴ = 26720539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5009 + ... + 8861.

It is an arithmetic number, because the mean of its divisors is an integer number (2138970).

Almost surely, 2^26720555 is an apocalyptic number.

26720555 is a deficient number, since it is larger than the sum of its proper divisors (7502965).

26720555 is a wasteful number, since it uses less digits than its factorization.

26720555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 26720555 is about 5169.1928770360. The cubic root of 26720555 is about 298.9614272228.

The spelling of 26720555 in words is "twenty-six million, seven hundred twenty thousand, five hundred fifty-five".