6542166005 has 4 divisors (see below), whose sum is σ = 7850599212. Its totient is φ = 5233732800.

The previous prime is 6542165963. The next prime is 6542166031. The reversal of 6542166005 is 5006612456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4664070436 + 1878095569 = 68294^2 + 43337^2 .

It is not a de Polignac number, because 6542166005 - 2²⁴ = 6525388789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654216596 + ... + 654216605.

It is an arithmetic number, because the mean of its divisors is an integer number (1962649803).

Almost surely, 2^6542166005 is an apocalyptic number.

It is an amenable number.

6542166005 is a deficient number, since it is larger than the sum of its proper divisors (1308433207).

6542166005 is a wasteful number, since it uses less digits than its factorization.

6542166005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308433206.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 6542166005 is about 80883.6572182539. The cubic root of 6542166005 is about 1870.2823984659.

The spelling of 6542166005 in words is "six billion, five hundred forty-two million, one hundred sixty-six thousand, five".