1668520367 has 2 divisors, whose sum is σ = 1668520368. Its totient is φ = 1668520366.

The previous prime is 1668520333. The next prime is 1668520391. The reversal of 1668520367 is 7630258661.

It is a strong prime.

It is an emirp because it is prime and its reverse (7630258661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1668520367 - 2⁸ = 1668520111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668520067) 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, 834260183 + 834260184.

It is an arithmetic number, because the mean of its divisors is an integer number (834260184).

Almost surely, 2^1668520367 is an apocalyptic number.

1668520367 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668520367 is an equidigital number, since it uses as much as digits as its factorization.

1668520367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 1668520367 is about 40847.5258369464. The cubic root of 1668520367 is about 1186.0704995881.

The spelling of 1668520367 in words is "one billion, six hundred sixty-eight million, five hundred twenty thousand, three hundred sixty-seven".