667696767 has 8 divisors (see below), whose sum is σ = 911976240. Its totient is φ = 434274240.

The previous prime is 667696753. The next prime is 667696793. The reversal of 667696767 is 767696766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667696767 - 2⁴ = 667696751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667696767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667696717) 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, 2714092 + ... + 2714337.

It is an arithmetic number, because the mean of its divisors is an integer number (113997030).

Almost surely, 2^667696767 is an apocalyptic number.

667696767 is a deficient number, since it is larger than the sum of its proper divisors (244279473).

667696767 is a wasteful number, since it uses less digits than its factorization.

667696767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5428473.

The product of its digits is 24004512, while the sum is 60.

The square root of 667696767 is about 25839.8290822521. The cubic root of 667696767 is about 874.0301709585.

Subtracting 667696767 from its reverse (767696766), we obtain a palindrome (99999999).

It can be divided in two parts, 66769 and 6767, that added together give a triangular number (73536 = T₃₈₃).

The spelling of 667696767 in words is "six hundred sixty-seven million, six hundred ninety-six thousand, seven hundred sixty-seven".