66032013 has 16 divisors (see below), whose sum is σ = 90660096. Its totient is φ = 42719040.

The previous prime is 66032009. The next prime is 66032023. The reversal of 66032013 is 31023066.

It is not a de Polignac number, because 66032013 - 2² = 66032009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66032003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72028 + ... + 72938.

It is an arithmetic number, because the mean of its divisors is an integer number (5666256).

Almost surely, 2^66032013 is an apocalyptic number.

It is an amenable number.

66032013 is a deficient number, since it is larger than the sum of its proper divisors (24628083).

66032013 is a wasteful number, since it uses less digits than its factorization.

66032013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 66032013 is about 8126.0084297274. The cubic root of 66032013 is about 404.1893310043.

Adding to 66032013 its reverse (31023066), we get a palindrome (97055079).

The spelling of 66032013 in words is "sixty-six million, thirty-two thousand, thirteen".