667006669 has 12 divisors (see below), whose sum is σ = 793952544. Its totient is φ = 558422424.

The previous prime is 667006631. The next prime is 667006687. The reversal of 667006669 is 966600766.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-667006669 is a prime.

It is a super-2 number, since 2×667006669² = 889795792980951122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667006619) 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 11 ways as a sum of consecutive naturals, for example, 156177 + ... + 160390.

It is an arithmetic number, because the mean of its divisors is an integer number (66162712).

Almost surely, 2^667006669 is an apocalyptic number.

It is an amenable number.

667006669 is a deficient number, since it is larger than the sum of its proper divisors (126945875).

667006669 is a wasteful number, since it uses less digits than its factorization.

667006669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316624 (or 316617 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 667006669 is about 25826.4722523228. The cubic root of 667006669 is about 873.7289491948.

The spelling of 667006669 in words is "six hundred sixty-seven million, six thousand, six hundred sixty-nine".