675978 has 8 divisors (see below), whose sum is σ = 1351968. Its totient is φ = 225324.

The previous prime is 675977. The next prime is 675979. The reversal of 675978 is 879576.

It is an interprime number because it is at equal distance from previous prime (675977) and next prime (675979).

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

675978 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (675973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56326 + ... + 56337.

It is an arithmetic number, because the mean of its divisors is an integer number (168996).

2⁶⁷⁵⁹⁷⁸ is an apocalyptic number.

675978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

675978 is a wasteful number, since it uses less digits than its factorization.

675978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112668.

The product of its digits is 105840, while the sum is 42.

The square root of 675978 is about 822.1788126679. The cubic root of 675978 is about 87.7628774699.

It can be divided in two parts, 675 and 978, that added together give a triangular number (1653 = T₅₇).

The spelling of 675978 in words is "six hundred seventy-five thousand, nine hundred seventy-eight".