6542166203 has 4 divisors (see below), whose sum is σ = 6886490760. Its totient is φ = 6197841648.

The previous prime is 6542166187. The next prime is 6542166209. The reversal of 6542166203 is 3026612456.

It is a happy number.

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

It is not a de Polignac number, because 6542166203 - 2⁴ = 6542166187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6542166209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172162250 + ... + 172162287.

It is an arithmetic number, because the mean of its divisors is an integer number (1721622690).

Almost surely, 2^6542166203 is an apocalyptic number.

6542166203 is a deficient number, since it is larger than the sum of its proper divisors (344324557).

6542166203 is a wasteful number, since it uses less digits than its factorization.

6542166203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344324556.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6542166203 is about 80883.6584422342. The cubic root of 6542166203 is about 1870.2824173341.

Adding to 6542166203 its reverse (3026612456), we get a palindrome (9568778659).

The spelling of 6542166203 in words is "six billion, five hundred forty-two million, one hundred sixty-six thousand, two hundred three".