66653713 has 4 divisors (see below), whose sum is σ = 76175680. Its totient is φ = 57131748.

The previous prime is 66653711. The next prime is 66653749. The reversal of 66653713 is 31735666.

66653713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66653713 - 2¹ = 66653711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66653711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4760973 + ... + 4760986.

It is an arithmetic number, because the mean of its divisors is an integer number (19043920).

Almost surely, 2^66653713 is an apocalyptic number.

It is an amenable number.

66653713 is a deficient number, since it is larger than the sum of its proper divisors (9521967).

66653713 is an equidigital number, since it uses as much as digits as its factorization.

66653713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9521966.

The product of its digits is 68040, while the sum is 37.

The square root of 66653713 is about 8164.1725238998. The cubic root of 66653713 is about 405.4538690647.

The spelling of 66653713 in words is "sixty-six million, six hundred fifty-three thousand, seven hundred thirteen".