63669959775 has 36 divisors (see below), whose sum is σ = 114289697392. Its totient is φ = 33882952320.

The previous prime is 63669959761. The next prime is 63669959789. The reversal of 63669959775 is 57795996636.

It is an interprime number because it is at equal distance from previous prime (63669959761) and next prime (63669959789).

It is not a de Polignac number, because 63669959775 - 2²⁰ = 63668911199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 206779 + ... + 412428.

Almost surely, 2^63669959775 is an apocalyptic number.

63669959775 is a deficient number, since it is larger than the sum of its proper divisors (50619737617).

63669959775 is a wasteful number, since it uses less digits than its factorization.

63669959775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619680 (or 619672 counting only the distinct ones).

The product of its digits is 578680200, while the sum is 72.

The spelling of 63669959775 in words is "sixty-three billion, six hundred sixty-nine million, nine hundred fifty-nine thousand, seven hundred seventy-five".