66487313 has 4 divisors (see below), whose sum is σ = 66504048. Its totient is φ = 66470580.

The previous prime is 66487301. The next prime is 66487349. The reversal of 66487313 is 31378466.

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 66487313 - 2¹⁸ = 66225169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66487913) 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, 1370 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (16626012).

Almost surely, 2^66487313 is an apocalyptic number.

It is an amenable number.

66487313 is a deficient number, since it is larger than the sum of its proper divisors (16735).

66487313 is a wasteful number, since it uses less digits than its factorization.

66487313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16734.

The product of its digits is 72576, while the sum is 38.

The square root of 66487313 is about 8153.9752881647. The cubic root of 66487313 is about 405.1161847224.

The spelling of 66487313 in words is "sixty-six million, four hundred eighty-seven thousand, three hundred thirteen".