7981466859 has 18 divisors (see below), whose sum is σ = 11720929428. Its totient is φ = 5233726800.

The previous prime is 7981466839. The next prime is 7981466881. The reversal of 7981466859 is 9586641897.

7981466859 is a `hidden beast` number, since 7 + 98 + 1 + 466 + 85 + 9 = 666.

It is not a de Polignac number, because 7981466859 - 2¹² = 7981462763 is a prime.

It is a super-3 number, since 3×7981466859³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7981466796 and 7981466805.

It is not an unprimeable number, because it can be changed into a prime (7981466839) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 85677 + ... + 152654.

It is an arithmetic number, because the mean of its divisors is an integer number (651162746).

Almost surely, 2^7981466859 is an apocalyptic number.

7981466859 is a deficient number, since it is larger than the sum of its proper divisors (3739462569).

7981466859 is a wasteful number, since it uses less digits than its factorization.

7981466859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238459 (or 238395 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The square root of 7981466859 is about 89339.0556195889. The cubic root of 7981466859 is about 1998.4543774164.

The spelling of 7981466859 in words is "seven billion, nine hundred eighty-one million, four hundred sixty-six thousand, eight hundred fifty-nine".