667707071 has 8 divisors (see below), whose sum is σ = 685376640. Its totient is φ = 650249368.

The previous prime is 667707067. The next prime is 667707083. The reversal of 667707071 is 170707766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667707071 - 2² = 667707067 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 (667707031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46571 + ... + 59196.

It is an arithmetic number, because the mean of its divisors is an integer number (85672080).

Almost surely, 2^667707071 is an apocalyptic number.

667707071 is a deficient number, since it is larger than the sum of its proper divisors (17669569).

667707071 is a wasteful number, since it uses less digits than its factorization.

667707071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105933.

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 667707071 is about 25840.0284636066. The cubic root of 667707071 is about 874.0346669917.

The spelling of 667707071 in words is "six hundred sixty-seven million, seven hundred seven thousand, seventy-one".