666960958 has 16 divisors (see below), whose sum is σ = 1006899984. Its totient is φ = 331334080.

The previous prime is 666960953. The next prime is 666960961. The reversal of 666960958 is 859069666.

It is a junction number, because it is equal to n+sod(n) for n = 666960899 and 666960908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666960953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278928 + ... + 281308.

It is an arithmetic number, because the mean of its divisors is an integer number (62931249).

Almost surely, 2^666960958 is an apocalyptic number.

666960958 is a deficient number, since it is larger than the sum of its proper divisors (339939026).

666960958 is a wasteful number, since it uses less digits than its factorization.

666960958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The square root of 666960958 is about 25825.5872730902. The cubic root of 666960958 is about 873.7089894062.

The spelling of 666960958 in words is "six hundred sixty-six million, nine hundred sixty thousand, nine hundred fifty-eight".