678000081 has 16 divisors (see below), whose sum is σ = 986923008. Its totient is φ = 410600400.

The previous prime is 678000079. The next prime is 678000091. The reversal of 678000081 is 180000876.

678000081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678000081 - 2¹ = 678000079 is a prime.

It is a super-2 number, since 2×678000081² = 919368219672013122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678000031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41560 + ... + 55526.

It is an arithmetic number, because the mean of its divisors is an integer number (61682688).

Almost surely, 2^678000081 is an apocalyptic number.

It is an amenable number.

678000081 is a deficient number, since it is larger than the sum of its proper divisors (308922927).

678000081 is a wasteful number, since it uses less digits than its factorization.

678000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15452.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 678000081 is about 26038.4346879762. The cubic root of 678000081 is about 878.5029993483.

It can be divided in two parts, 6 and 78000081, that added together give a palindrome (78000087).

The spelling of 678000081 in words is "six hundred seventy-eight million, eighty-one", and thus it is an aban number.