678040071 has 8 divisors (see below), whose sum is σ = 918874224. Its totient is φ = 444616320.

The previous prime is 678040063. The next prime is 678040079. The reversal of 678040071 is 170040876.

It is an interprime number because it is at equal distance from previous prime (678040063) and next prime (678040079).

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

It is not a de Polignac number, because 678040071 - 2³ = 678040063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678040079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1852386 + ... + 1852751.

It is an arithmetic number, because the mean of its divisors is an integer number (114859278).

Almost surely, 2^678040071 is an apocalyptic number.

678040071 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

678040071 is a deficient number, since it is larger than the sum of its proper divisors (240834153).

678040071 is a wasteful number, since it uses less digits than its factorization.

678040071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705201.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 678040071 is about 26039.2025799562. The cubic root of 678040071 is about 878.5202710494.

The spelling of 678040071 in words is "six hundred seventy-eight million, forty thousand, seventy-one".