66504255 has 32 divisors (see below), whose sum is σ = 115432128. Its totient is φ = 32563200.

The previous prime is 66504253. The next prime is 66504257. The reversal of 66504255 is 55240566.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66504253) and next prime (66504257).

It is not a de Polignac number, because 66504255 - 2¹ = 66504253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66504253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7275 + ... + 13635.

It is an arithmetic number, because the mean of its divisors is an integer number (3607254).

Almost surely, 2^66504255 is an apocalyptic number.

66504255 is a deficient number, since it is larger than the sum of its proper divisors (48927873).

66504255 is a wasteful number, since it uses less digits than its factorization.

66504255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 66504255 is about 8155.0141017659. The cubic root of 66504255 is about 405.1505917654.

The spelling of 66504255 in words is "sixty-six million, five hundred four thousand, two hundred fifty-five".