66127013 has 4 divisors (see below), whose sum is σ = 66923808. Its totient is φ = 65330220.

The previous prime is 66127003. The next prime is 66127027. The reversal of 66127013 is 31072166.

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 66127013 - 2¹⁶ = 66061477 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 (66127003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398273 + ... + 398438.

It is an arithmetic number, because the mean of its divisors is an integer number (16730952).

Almost surely, 2^66127013 is an apocalyptic number.

It is an amenable number.

66127013 is a deficient number, since it is larger than the sum of its proper divisors (796795).

66127013 is an equidigital number, since it uses as much as digits as its factorization.

66127013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796794.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 66127013 is about 8131.8517571338. The cubic root of 66127013 is about 404.3830733274.

Adding to 66127013 its reverse (31072166), we get a palindrome (97199179).

The spelling of 66127013 in words is "sixty-six million, one hundred twenty-seven thousand, thirteen".