667743076 has 96 divisors (see below), whose sum is σ = 1589575680. Its totient is φ = 236995200.

The previous prime is 667743071. The next prime is 667743077. The reversal of 667743076 is 670347766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (667743071) 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 31 ways as a sum of consecutive naturals, for example, 315261 + ... + 317371.

It is an arithmetic number, because the mean of its divisors is an integer number (16558080).

Almost surely, 2^667743076 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667743076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794787840).

667743076 is an abundant number, since it is smaller than the sum of its proper divisors (921832604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667743076 is a wasteful number, since it uses less digits than its factorization.

667743076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225 (or 2223 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 46.

The square root of 667743076 is about 25840.7251446239. The cubic root of 667743076 is about 874.0503770008.

The spelling of 667743076 in words is "six hundred sixty-seven million, seven hundred forty-three thousand, seventy-six".