66518364 has 24 divisors (see below), whose sum is σ = 169319808. Its totient is φ = 20157040.

The previous prime is 66518363. The next prime is 66518393. The reversal of 66518364 is 46381566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66518363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251832 + ... + 252095.

It is an arithmetic number, because the mean of its divisors is an integer number (7054992).

Almost surely, 2^66518364 is an apocalyptic number.

It is an amenable number.

66518364 is an abundant number, since it is smaller than the sum of its proper divisors (102801444).

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

66518364 is a wasteful number, since it uses less digits than its factorization.

66518364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503945 (or 503943 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 66518364 is about 8155.8791065096. The cubic root of 66518364 is about 405.1792408872.

The spelling of 66518364 in words is "sixty-six million, five hundred eighteen thousand, three hundred sixty-four".