667746713 has 4 divisors (see below), whose sum is σ = 668933328. Its totient is φ = 666560100.

The previous prime is 667746691. The next prime is 667746749. The reversal of 667746713 is 317647766.

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, and also an emirpimes, since its reverse is a distinct semiprime: 317647766 = 2 ⋅158823883.

It is a cyclic number.

It is not a de Polignac number, because 667746713 - 2¹² = 667742617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667745713) 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, 592463 + ... + 593588.

It is an arithmetic number, because the mean of its divisors is an integer number (167233332).

Almost surely, 2^667746713 is an apocalyptic number.

It is an amenable number.

667746713 is a deficient number, since it is larger than the sum of its proper divisors (1186615).

667746713 is a wasteful number, since it uses less digits than its factorization.

667746713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186614.

The product of its digits is 889056, while the sum is 47.

The square root of 667746713 is about 25840.7955179402. The cubic root of 667746713 is about 874.0519638963.

The spelling of 667746713 in words is "six hundred sixty-seven million, seven hundred forty-six thousand, seven hundred thirteen".