66498133 has 16 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 59883840.

The previous prime is 66498121. The next prime is 66498137. The reversal of 66498133 is 33189466.

It is a cyclic number.

It is not a de Polignac number, because 66498133 - 2¹⁷ = 66367061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66498137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138588 + ... + 139066.

It is an arithmetic number, because the mean of its divisors is an integer number (4586400).

Almost surely, 2^66498133 is an apocalyptic number.

It is an amenable number.

66498133 is a deficient number, since it is larger than the sum of its proper divisors (6884267).

66498133 is a wasteful number, since it uses less digits than its factorization.

66498133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its digits is 93312, while the sum is 40.

The square root of 66498133 is about 8154.6387412319. The cubic root of 66498133 is about 405.1381594379.

The spelling of 66498133 in words is "sixty-six million, four hundred ninety-eight thousand, one hundred thirty-three".