66533285 has 64 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 39536640.

The previous prime is 66533281. The next prime is 66533287. The reversal of 66533285 is 58233566.

It is a happy number.

It is not a de Polignac number, because 66533285 - 2² = 66533281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66533281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 747521 + ... + 747609.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^66533285 is an apocalyptic number.

66533285 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66533285 is a deficient number, since it is larger than the sum of its proper divisors (37976155).

66533285 is a wasteful number, since it uses less digits than its factorization.

66533285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its digits is 129600, while the sum is 38.

The square root of 66533285 is about 8156.7937941326. The cubic root of 66533285 is about 405.2095344137.

The spelling of 66533285 in words is "sixty-six million, five hundred thirty-three thousand, two hundred eighty-five".