63665212679 has 4 divisors (see below), whose sum is σ = 63667614960. Its totient is φ = 63662810400.

The previous prime is 63665212573. The next prime is 63665212697. The reversal of 63665212679 is 97621256636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63665212679 - 2¹² = 63665208583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63665212679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63665211679) 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 in 3 ways as a sum of consecutive naturals, for example, 1160939 + ... + 1214540.

It is an arithmetic number, because the mean of its divisors is an integer number (15916903740).

Almost surely, 2^63665212679 is an apocalyptic number.

63665212679 is a deficient number, since it is larger than the sum of its proper divisors (2402281).

63665212679 is a wasteful number, since it uses less digits than its factorization.

63665212679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402280.

The product of its digits is 4898880, while the sum is 53.

The spelling of 63665212679 in words is "sixty-three billion, six hundred sixty-five million, two hundred twelve thousand, six hundred seventy-nine".