667545767 has 12 divisors (see below), whose sum is σ = 810296496. Its totient is φ = 547303680.

The previous prime is 667545731. The next prime is 667545773. The reversal of 667545767 is 767545766.

It is not a de Polignac number, because 667545767 - 2¹² = 667541671 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 (667545787) 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, 295034 + ... + 297287.

It is an arithmetic number, because the mean of its divisors is an integer number (67524708).

Almost surely, 2^667545767 is an apocalyptic number.

667545767 is a deficient number, since it is larger than the sum of its proper divisors (142750729).

667545767 is a wasteful number, since it uses less digits than its factorization.

667545767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592358 (or 592351 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 53.

The square root of 667545767 is about 25836.9070710873. The cubic root of 667545767 is about 873.9642785192.

Subtracting 667545767 from its reverse (767545766), we obtain a palindrome (99999999).

The spelling of 667545767 in words is "six hundred sixty-seven million, five hundred forty-five thousand, seven hundred sixty-seven".