667006671 has 8 divisors (see below), whose sum is σ = 891112320. Its totient is φ = 443786072.

The previous prime is 667006631. The next prime is 667006687. The reversal of 667006671 is 176600766.

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 667006671 - 2²¹ = 664909519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667006631) 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, 219501 + ... + 222518.

It is an arithmetic number, because the mean of its divisors is an integer number (111389040).

Almost surely, 2^667006671 is an apocalyptic number.

667006671 is a deficient number, since it is larger than the sum of its proper divisors (224105649).

667006671 is a wasteful number, since it uses less digits than its factorization.

667006671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442525.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 667006671 is about 25826.4722910428. The cubic root of 667006671 is about 873.7289500681.

The spelling of 667006671 in words is "six hundred sixty-seven million, six thousand, six hundred seventy-one".