6640142102 has 16 divisors (see below), whose sum is σ = 10887480000. Its totient is φ = 3012192840.

The previous prime is 6640142083. The next prime is 6640142107. The reversal of 6640142102 is 2012410466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640142107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291452 + ... + 313407.

It is an arithmetic number, because the mean of its divisors is an integer number (680467500).

Almost surely, 2^6640142102 is an apocalyptic number.

6640142102 is a deficient number, since it is larger than the sum of its proper divisors (4247337898).

6640142102 is a wasteful number, since it uses less digits than its factorization.

6640142102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605371.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 6640142102 is about 81487.0670842926. The cubic root of 6640142102 is about 1879.5726829839.

Adding to 6640142102 its reverse (2012410466), we get a palindrome (8652552568).

The spelling of 6640142102 in words is "six billion, six hundred forty million, one hundred forty-two thousand, one hundred two".