667340677 has 4 divisors (see below), whose sum is σ = 672595456. Its totient is φ = 662085900.

The previous prime is 667340651. The next prime is 667340701. The reversal of 667340677 is 776043766.

It is a happy number.

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: 776043766 = 2 ⋅388021883.

It is a cyclic number.

It is not a de Polignac number, because 667340677 - 2²⁷ = 533122949 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 (667340777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2627199 + ... + 2627452.

It is an arithmetic number, because the mean of its divisors is an integer number (168148864).

Almost surely, 2^667340677 is an apocalyptic number.

It is an amenable number.

667340677 is a deficient number, since it is larger than the sum of its proper divisors (5254779).

667340677 is a wasteful number, since it uses less digits than its factorization.

667340677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5254778.

The product of its (nonzero) digits is 889056, while the sum is 46.

The square root of 667340677 is about 25832.9378313811. The cubic root of 667340677 is about 873.8747667074.

The spelling of 667340677 in words is "six hundred sixty-seven million, three hundred forty thousand, six hundred seventy-seven".