678107641 has 4 divisors (see below), whose sum is σ = 678427984. Its totient is φ = 677787300.

The previous prime is 678107579. The next prime is 678107653. The reversal of 678107641 is 146701876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678107641 - 2⁷ = 678107513 is a prime.

It is the 26041-st Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678107594 and 678107603.

It is not an unprimeable number, because it can be changed into a prime (678107041) by changing a digit.

It is a nontrivial repunit in base 26040.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156975 + ... + 161236.

It is an arithmetic number, because the mean of its divisors is an integer number (169606996).

Almost surely, 2^678107641 is an apocalyptic number.

It is an amenable number.

678107641 is a deficient number, since it is larger than the sum of its proper divisors (320343).

678107641 is a wasteful number, since it uses less digits than its factorization.

678107641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320342.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 678107641 is about 26040.5000144006. The cubic root of 678107641 is about 878.5494530233.

The spelling of 678107641 in words is "six hundred seventy-eight million, one hundred seven thousand, six hundred forty-one".