66528499 has 4 divisors (see below), whose sum is σ = 66546064. Its totient is φ = 66510936.

The previous prime is 66528467. The next prime is 66528503. The reversal of 66528499 is 99482566.

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

It is a cyclic number.

It is not a de Polignac number, because 66528499 - 2⁵ = 66528467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66528419) 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 3 ways as a sum of consecutive naturals, for example, 492 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (16636516).

Almost surely, 2^66528499 is an apocalyptic number.

66528499 is a deficient number, since it is larger than the sum of its proper divisors (17565).

66528499 is a wasteful number, since it uses less digits than its factorization.

66528499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17564.

The product of its digits is 933120, while the sum is 49.

The square root of 66528499 is about 8156.5004137804. The cubic root of 66528499 is about 405.1998180773.

It can be divided in two parts, 6652 and 8499, that added together give a palindrome (15151).

The spelling of 66528499 in words is "sixty-six million, five hundred twenty-eight thousand, four hundred ninety-nine".