66512814 has 16 divisors (see below), whose sum is σ = 135207120. Its totient is φ = 21807360.

The previous prime is 66512801. The next prime is 66512819. The reversal of 66512814 is 41821566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66512819) 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, 90499 + ... + 91230.

It is an arithmetic number, because the mean of its divisors is an integer number (8450445).

Almost surely, 2^66512814 is an apocalyptic number.

66512814 is an abundant number, since it is smaller than the sum of its proper divisors (68694306).

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

66512814 is a wasteful number, since it uses less digits than its factorization.

66512814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181795.

The product of its digits is 11520, while the sum is 33.

The square root of 66512814 is about 8155.5388540550. The cubic root of 66512814 is about 405.1679717820.

The spelling of 66512814 in words is "sixty-six million, five hundred twelve thousand, eight hundred fourteen".