66302802563 has 4 divisors (see below), whose sum is σ = 67844728248. Its totient is φ = 64760876880.

The previous prime is 66302802557. The next prime is 66302802571. The reversal of 66302802563 is 36520820366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36520820366 = 2 ⋅18260410183.

It is a cyclic number.

It is not a de Polignac number, because 66302802563 - 2¹² = 66302798467 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 66302802563.

It is not an unprimeable number, because it can be changed into a prime (66302802463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770962778 + ... + 770962863.

It is an arithmetic number, because the mean of its divisors is an integer number (16961182062).

Almost surely, 2^66302802563 is an apocalyptic number.

66302802563 is a deficient number, since it is larger than the sum of its proper divisors (1541925685).

66302802563 is a wasteful number, since it uses less digits than its factorization.

66302802563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541925684.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 66302802563 in words is "sixty-six billion, three hundred two million, eight hundred two thousand, five hundred sixty-three".