667771067 has 8 divisors (see below), whose sum is σ = 709807536. Its totient is φ = 626040832.

The previous prime is 667771021. The next prime is 667771073. The reversal of 667771067 is 760177766.

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 667771067 - 2¹⁸ = 667508923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667771267) 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 7 ways as a sum of consecutive naturals, for example, 72053 + ... + 80790.

It is an arithmetic number, because the mean of its divisors is an integer number (88725942).

Almost surely, 2^667771067 is an apocalyptic number.

667771067 is a deficient number, since it is larger than the sum of its proper divisors (42036469).

667771067 is a wasteful number, since it uses less digits than its factorization.

667771067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153117.

The product of its (nonzero) digits is 518616, while the sum is 47.

The square root of 667771067 is about 25841.2667452662. The cubic root of 667771067 is about 874.0625898829.

The spelling of 667771067 in words is "six hundred sixty-seven million, seven hundred seventy-one thousand, sixty-seven".