663145387 has 2 divisors, whose sum is σ = 663145388. Its totient is φ = 663145386.

The previous prime is 663145369. The next prime is 663145433. The reversal of 663145387 is 783541366.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663145387 is a prime.

It is not a weakly prime, because it can be changed into another prime (663145687) 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, 331572693 + 331572694.

It is an arithmetic number, because the mean of its divisors is an integer number (331572694).

Almost surely, 2^663145387 is an apocalyptic number.

663145387 is a deficient number, since it is larger than the sum of its proper divisors (1).

663145387 is an equidigital number, since it uses as much as digits as its factorization.

663145387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 663145387 is about 25751.6094060158. The cubic root of 663145387 is about 872.0396882274.

The spelling of 663145387 in words is "six hundred sixty-three million, one hundred forty-five thousand, three hundred eighty-seven".