660694367 has 2 divisors, whose sum is σ = 660694368. Its totient is φ = 660694366.

The previous prime is 660694361. The next prime is 660694379. The reversal of 660694367 is 763496066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660694367 - 2¹² = 660690271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660694361) 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 as a sum of consecutive naturals, namely, 330347183 + 330347184.

It is an arithmetic number, because the mean of its divisors is an integer number (330347184).

Almost surely, 2^660694367 is an apocalyptic number.

660694367 is a deficient number, since it is larger than the sum of its proper divisors (1).

660694367 is an equidigital number, since it uses as much as digits as its factorization.

660694367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 47.

The square root of 660694367 is about 25703.9757041591. The cubic root of 660694367 is about 870.9639937785.

The spelling of 660694367 in words is "six hundred sixty million, six hundred ninety-four thousand, three hundred sixty-seven".