66513018 has 32 divisors (see below), whose sum is σ = 156284352. Its totient is φ = 18604800.

The previous prime is 66513017. The next prime is 66513047. The reversal of 66513018 is 81031566.

It is not an unprimeable number, because it can be changed into a prime (66513017) 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, 37903 + ... + 39618.

It is an arithmetic number, because the mean of its divisors is an integer number (4883886).

Almost surely, 2^66513018 is an apocalyptic number.

66513018 is an abundant number, since it is smaller than the sum of its proper divisors (89771334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66513018 is a wasteful number, since it uses less digits than its factorization.

66513018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77550.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 66513018 is about 8155.5513608830. The cubic root of 66513018 is about 405.1683860088.

It can be divided in two parts, 6651 and 3018, that added together give a palindrome (9669).

The spelling of 66513018 in words is "sixty-six million, five hundred thirteen thousand, eighteen".