6562666663 has 4 divisors (see below), whose sum is σ = 7500190480. Its totient is φ = 5625142848.

The previous prime is 6562666661. The next prime is 6562666673. The reversal of 6562666663 is 3666662656.

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 6562666663 - 2¹ = 6562666661 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 6562666663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6562666661) 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, 468761898 + ... + 468761911.

It is an arithmetic number, because the mean of its divisors is an integer number (1875047620).

Almost surely, 2^6562666663 is an apocalyptic number.

6562666663 is a deficient number, since it is larger than the sum of its proper divisors (937523817).

6562666663 is an equidigital number, since it uses as much as digits as its factorization.

6562666663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937523816.

The product of its digits is 8398080, while the sum is 52.

The square root of 6562666663 is about 81010.2873899359. The cubic root of 6562666663 is about 1872.2339457871.

The spelling of 6562666663 in words is "six billion, five hundred sixty-two million, six hundred sixty-six thousand, six hundred sixty-three".