6642670063 has 4 divisors (see below), whose sum is σ = 6804686448. Its totient is φ = 6480653680.

The previous prime is 6642670039. The next prime is 6642670079. The reversal of 6642670063 is 3600762466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6642670063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6642669998 and 6642670025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642670093) 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, 81008131 + ... + 81008212.

It is an arithmetic number, because the mean of its divisors is an integer number (1701171612).

Almost surely, 2^6642670063 is an apocalyptic number.

6642670063 is a deficient number, since it is larger than the sum of its proper divisors (162016385).

6642670063 is a wasteful number, since it uses less digits than its factorization.

6642670063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162016384.

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 6642670063 is about 81502.5770328767. The cubic root of 6642670063 is about 1879.8111760521.

The spelling of 6642670063 in words is "six billion, six hundred forty-two million, six hundred seventy thousand, sixty-three".