66256055 has 16 divisors (see below), whose sum is σ = 84628800. Its totient is φ = 49623552.

The previous prime is 66256049. The next prime is 66256093. The reversal of 66256055 is 55065266.

66256055 = 193² + 194² + ... + 590².

It is a cyclic number.

It is not a de Polignac number, because 66256055 - 2¹⁰ = 66255031 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14957 + ... + 18873.

It is an arithmetic number, because the mean of its divisors is an integer number (5289300).

Almost surely, 2^66256055 is an apocalyptic number.

66256055 is a deficient number, since it is larger than the sum of its proper divisors (18372745).

66256055 is a wasteful number, since it uses less digits than its factorization.

66256055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 66256055 is about 8139.7822452446. The cubic root of 66256055 is about 404.6459436813.

The spelling of 66256055 in words is "sixty-six million, two hundred fifty-six thousand, fifty-five".