66806246063 has 4 divisors (see below), whose sum is σ = 66809364960. Its totient is φ = 66803127168.

The previous prime is 66806246011. The next prime is 66806246099. The reversal of 66806246063 is 36064260866.

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 66806246063 - 2²⁴ = 66789468847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66806245999 and 66806246017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66806246863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527095 + ... + 1570232.

It is an arithmetic number, because the mean of its divisors is an integer number (16702341240).

Almost surely, 2^66806246063 is an apocalyptic number.

66806246063 is a deficient number, since it is larger than the sum of its proper divisors (3118897).

66806246063 is a wasteful number, since it uses less digits than its factorization.

66806246063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118896.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 66806246063 in words is "sixty-six billion, eight hundred six million, two hundred forty-six thousand, sixty-three".