667375767 has 10 divisors (see below), whose sum is σ = 996944168. Its totient is φ = 444917124.

The previous prime is 667375747. The next prime is 667375777. The reversal of 667375767 is 767573766.

It is a happy number.

667375767 is a `hidden beast` number, since 6 + 67 + 3 + 7 + 576 + 7 = 666.

It is not a de Polignac number, because 667375767 - 2¹⁴ = 667359383 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 (667375747) 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 9 ways as a sum of consecutive naturals, for example, 4119523 + ... + 4119684.

Almost surely, 2^667375767 is an apocalyptic number.

667375767 is a deficient number, since it is larger than the sum of its proper divisors (329568401).

667375767 is an equidigital number, since it uses as much as digits as its factorization.

667375767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239219 (or 8239210 counting only the distinct ones).

The product of its digits is 7779240, while the sum is 54.

The square root of 667375767 is about 25833.6169941416. The cubic root of 667375767 is about 873.8900830864.

The spelling of 667375767 in words is "six hundred sixty-seven million, three hundred seventy-five thousand, seven hundred sixty-seven".