6668680142 has 4 divisors (see below), whose sum is σ = 10003020216. Its totient is φ = 3334340070.

The previous prime is 6668680121. The next prime is 6668680147. The reversal of 6668680142 is 2410868666.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668680147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1667170034 + ... + 1667170037.

It is an arithmetic number, because the mean of its divisors is an integer number (2500755054).

Almost surely, 2^6668680142 is an apocalyptic number.

6668680142 is a deficient number, since it is larger than the sum of its proper divisors (3334340074).

6668680142 is a wasteful number, since it uses less digits than its factorization.

6668680142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334340073.

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 6668680142 is about 81661.9871298758. The cubic root of 6668680142 is about 1882.2615139733.

The spelling of 6668680142 in words is "six billion, six hundred sixty-eight million, six hundred eighty thousand, one hundred forty-two".