667701752659 has 2 divisors, whose sum is σ = 667701752660. Its totient is φ = 667701752658.

The previous prime is 667701752629. The next prime is 667701752791. The reversal of 667701752659 is 956257107766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667701752659 - 2¹⁵ = 667701719891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667701752597 and 667701752606.

It is not a weakly prime, because it can be changed into another prime (667701752629) 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 as a sum of consecutive naturals, namely, 333850876329 + 333850876330.

It is an arithmetic number, because the mean of its divisors is an integer number (333850876330).

Almost surely, 2^667701752659 is an apocalyptic number.

667701752659 is a deficient number, since it is larger than the sum of its proper divisors (1).

667701752659 is an equidigital number, since it uses as much as digits as its factorization.

667701752659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33339600, while the sum is 61.

The spelling of 667701752659 in words is "six hundred sixty-seven billion, seven hundred one million, seven hundred fifty-two thousand, six hundred fifty-nine".