66525633 has 12 divisors (see below), whose sum is σ = 98137728. Its totient is φ = 43406520.

The previous prime is 66525629. The next prime is 66525647. The reversal of 66525633 is 33652566.

It is not a de Polignac number, because 66525633 - 2² = 66525629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66525673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78213 + ... + 79058.

It is an arithmetic number, because the mean of its divisors is an integer number (8178144).

Almost surely, 2^66525633 is an apocalyptic number.

It is an amenable number.

66525633 is a deficient number, since it is larger than the sum of its proper divisors (31612095).

66525633 is a wasteful number, since it uses less digits than its factorization.

66525633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157324 (or 157321 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 66525633 is about 8156.3247237956. The cubic root of 66525633 is about 405.1939994213.

It can be divided in two parts, 6652563 and 3, that added together give a palindrome (6652566).

The spelling of 66525633 in words is "sixty-six million, five hundred twenty-five thousand, six hundred thirty-three".