66132013 has 4 divisors (see below), whose sum is σ = 66277180. Its totient is φ = 65986848.

The previous prime is 66131983. The next prime is 66132019. The reversal of 66132013 is 31023166.

66132013 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.

It can be written as a sum of positive squares in 2 ways, for example, as 29626249 + 36505764 = 5443^2 + 6042^2 .

It is a cyclic number.

It is not a de Polignac number, because 66132013 - 2⁹ = 66131501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66132019) 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, 71898 + ... + 72811.

It is an arithmetic number, because the mean of its divisors is an integer number (16569295).

Almost surely, 2^66132013 is an apocalyptic number.

It is an amenable number.

66132013 is a deficient number, since it is larger than the sum of its proper divisors (145167).

66132013 is a wasteful number, since it uses less digits than its factorization.

66132013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145166.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 66132013 is about 8132.1591843741. The cubic root of 66132013 is about 404.3932651503.

Adding to 66132013 its reverse (31023166), we get a palindrome (97155179).

The spelling of 66132013 in words is "sixty-six million, one hundred thirty-two thousand, thirteen".