663470051639 has 2 divisors, whose sum is σ = 663470051640. Its totient is φ = 663470051638.

The previous prime is 663470051627. The next prime is 663470051653. The reversal of 663470051639 is 936150074366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663470051639 - 2²⁰ = 663469003063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663470051659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331735025819 + 331735025820.

It is an arithmetic number, because the mean of its divisors is an integer number (331735025820).

Almost surely, 2^663470051639 is an apocalyptic number.

663470051639 is a deficient number, since it is larger than the sum of its proper divisors (1).

663470051639 is an equidigital number, since it uses as much as digits as its factorization.

663470051639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 663470051639 in words is "six hundred sixty-three billion, four hundred seventy million, fifty-one thousand, six hundred thirty-nine".