667320071 has 8 divisors (see below), whose sum is σ = 766300800. Its totient is φ = 574725240.

The previous prime is 667320047. The next prime is 667320107. The reversal of 667320071 is 170023766.

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 667320071 - 2¹⁸ = 667057927 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 (667320001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596251 + ... + 1596668.

It is an arithmetic number, because the mean of its divisors is an integer number (95787600).

Almost surely, 2^667320071 is an apocalyptic number.

667320071 is a deficient number, since it is larger than the sum of its proper divisors (98980729).

667320071 is a wasteful number, since it uses less digits than its factorization.

667320071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192949.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 667320071 is about 25832.5389963898. The cubic root of 667320071 is about 873.8657721766.

The spelling of 667320071 in words is "six hundred sixty-seven million, three hundred twenty thousand, seventy-one".