66535522 has 4 divisors (see below), whose sum is σ = 99803286. Its totient is φ = 33267760.

The previous prime is 66535519. The next prime is 66535523. The reversal of 66535522 is 22553566.

66535522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66438801 + 96721 = 8151^2 + 311^2 .

It is not an unprimeable number, because it can be changed into a prime (66535523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16633879 + ... + 16633882.

Almost surely, 2^66535522 is an apocalyptic number.

66535522 is a deficient number, since it is larger than the sum of its proper divisors (33267764).

66535522 is a wasteful number, since it uses less digits than its factorization.

66535522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33267763.

The product of its digits is 54000, while the sum is 34.

The square root of 66535522 is about 8156.9309179372. The cubic root of 66535522 is about 405.2140757175.

The spelling of 66535522 in words is "sixty-six million, five hundred thirty-five thousand, five hundred twenty-two".