42179981566 has 8 divisors (see below), whose sum is σ = 66020840784. Its totient is φ = 20173034640.

The previous prime is 42179981561. The next prime is 42179981573. The reversal of 42179981566 is 66518997124.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42179981566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42179981561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458478015 + ... + 458478106.

It is an arithmetic number, because the mean of its divisors is an integer number (8252605098).

Almost surely, 2^42179981566 is an apocalyptic number.

42179981566 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

42179981566 is a deficient number, since it is larger than the sum of its proper divisors (23840859218).

42179981566 is a wasteful number, since it uses less digits than its factorization.

42179981566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916956146.

The product of its digits is 6531840, while the sum is 58.

The spelling of 42179981566 in words is "forty-two billion, one hundred seventy-nine million, nine hundred eighty-one thousand, five hundred sixty-six".