66513706 has 16 divisors (see below), whose sum is σ = 114264000. Its totient is φ = 28445760.

The previous prime is 66513703. The next prime is 66513719. The reversal of 66513706 is 60731566.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66513703) 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 7 ways as a sum of consecutive naturals, for example, 2226 + ... + 11746.

It is an arithmetic number, because the mean of its divisors is an integer number (7141500).

Almost surely, 2^66513706 is an apocalyptic number.

66513706 is a deficient number, since it is larger than the sum of its proper divisors (47750294).

66513706 is a wasteful number, since it uses less digits than its factorization.

66513706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10029.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 66513706 is about 8155.5935406321. The cubic root of 66513706 is about 405.1697830030.

The spelling of 66513706 in words is "sixty-six million, five hundred thirteen thousand, seven hundred six".