666676767 has 8 divisors (see below), whose sum is σ = 912926896. Its totient is φ = 432438912.

The previous prime is 666676741. The next prime is 666676783. The reversal of 666676767 is 767676666.

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

It is not a de Polignac number, because 666676767 - 2⁷ = 666676639 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 (666676727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3002938 + ... + 3003159.

It is an arithmetic number, because the mean of its divisors is an integer number (114115862).

Almost surely, 2^666676767 is an apocalyptic number.

666676767 is a deficient number, since it is larger than the sum of its proper divisors (246250129).

666676767 is a wasteful number, since it uses less digits than its factorization.

666676767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006137.

The product of its digits is 16003008, while the sum is 57.

The square root of 666676767 is about 25820.0845660892. The cubic root of 666676767 is about 873.5848764410.

The spelling of 666676767 in words is "six hundred sixty-six million, six hundred seventy-six thousand, seven hundred sixty-seven".