667710371 has 4 divisors (see below), whose sum is σ = 668290632. Its totient is φ = 667130112.

The previous prime is 667710359. The next prime is 667710397. The reversal of 667710371 is 173017766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173017766 = 2 ⋅86508883.

It is a cyclic number.

It is not a de Polignac number, because 667710371 - 2¹⁸ = 667448227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667710301) 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, 288401 + ... + 290706.

It is an arithmetic number, because the mean of its divisors is an integer number (167072658).

Almost surely, 2^667710371 is an apocalyptic number.

667710371 is a deficient number, since it is larger than the sum of its proper divisors (580261).

667710371 is a wasteful number, since it uses less digits than its factorization.

667710371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580260.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 667710371 is about 25840.0923179465. The cubic root of 667710371 is about 874.0361068994.

The spelling of 667710371 in words is "six hundred sixty-seven million, seven hundred ten thousand, three hundred seventy-one".