6642619263 has 12 divisors (see below), whose sum is σ = 10965593808. Its totient is φ = 3795782400.

The previous prime is 6642619183. The next prime is 6642619283. The reversal of 6642619263 is 3629162466.

6642619263 is a `hidden beast` number, since 6 + 6 + 4 + 2 + 619 + 26 + 3 = 666.

It is not a de Polignac number, because 6642619263 - 2²⁰ = 6641570687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642619283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52719138 + ... + 52719263.

It is an arithmetic number, because the mean of its divisors is an integer number (913799484).

Almost surely, 2^6642619263 is an apocalyptic number.

6642619263 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6642619263 is a deficient number, since it is larger than the sum of its proper divisors (4322974545).

6642619263 is a wasteful number, since it uses less digits than its factorization.

6642619263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105438414 (or 105438411 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 6642619263 is about 81502.2653856934. The cubic root of 6642619263 is about 1879.8063840708.

The spelling of 6642619263 in words is "six billion, six hundred forty-two million, six hundred nineteen thousand, two hundred sixty-three".