663769747 has 2 divisors, whose sum is σ = 663769748. Its totient is φ = 663769746.

The previous prime is 663769703. The next prime is 663769753. The reversal of 663769747 is 747967366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663769747 is a prime.

It is not a weakly prime, because it can be changed into another prime (663769147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331884873 + 331884874.

It is an arithmetic number, because the mean of its divisors is an integer number (331884874).

Almost surely, 2^663769747 is an apocalyptic number.

663769747 is a deficient number, since it is larger than the sum of its proper divisors (1).

663769747 is an equidigital number, since it uses as much as digits as its factorization.

663769747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 55.

The square root of 663769747 is about 25763.7292913895. The cubic root of 663769747 is about 872.3132812813.

The spelling of 663769747 in words is "six hundred sixty-three million, seven hundred sixty-nine thousand, seven hundred forty-seven".