667701752791 has 2 divisors, whose sum is σ = 667701752792. Its totient is φ = 667701752790.

The previous prime is 667701752659. The next prime is 667701752833. The reversal of 667701752791 is 197257107766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667701752791 - 2¹³ = 667701744599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667701752191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333850876395 + 333850876396.

It is an arithmetic number, because the mean of its divisors is an integer number (333850876396).

Almost surely, 2^667701752791 is an apocalyptic number.

667701752791 is a deficient number, since it is larger than the sum of its proper divisors (1).

667701752791 is an equidigital number, since it uses as much as digits as its factorization.

667701752791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7779240, while the sum is 58.

The spelling of 667701752791 in words is "six hundred sixty-seven billion, seven hundred one million, seven hundred fifty-two thousand, seven hundred ninety-one".