981683666642 has 8 divisors (see below), whose sum is σ = 1682886285696. Its totient is φ = 420721571412.

The previous prime is 981683666599. The next prime is 981683666669. The reversal of 981683666642 is 246666386189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 35060130938 + ... + 35060130965.

It is an arithmetic number, because the mean of its divisors is an integer number (210360785712).

Almost surely, 2^981683666642 is an apocalyptic number.

981683666642 is a deficient number, since it is larger than the sum of its proper divisors (701202619054).

981683666642 is a wasteful number, since it uses less digits than its factorization.

981683666642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70120261912.

The product of its digits is 107495424, while the sum is 65.

The spelling of 981683666642 in words is "nine hundred eighty-one billion, six hundred eighty-three million, six hundred sixty-six thousand, six hundred forty-two".