678494877 has 8 divisors (see below), whose sum is σ = 906230016. Its totient is φ = 451544832.

The previous prime is 678494857. The next prime is 678494879. The reversal of 678494877 is 778494876.

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

It is not a de Polignac number, because 678494877 - 2¹² = 678490781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678494877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678494879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194253 + ... + 197714.

It is an arithmetic number, because the mean of its divisors is an integer number (113278752).

Almost surely, 2^678494877 is an apocalyptic number.

It is an amenable number.

678494877 is a deficient number, since it is larger than the sum of its proper divisors (227735139).

678494877 is a wasteful number, since it uses less digits than its factorization.

678494877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392547.

The product of its digits is 18966528, while the sum is 60.

The square root of 678494877 is about 26047.9342175152. The cubic root of 678494877 is about 878.7166542252.

Subtracting 678494877 from its reverse (778494876), we obtain a palindrome (99999999).

The spelling of 678494877 in words is "six hundred seventy-eight million, four hundred ninety-four thousand, eight hundred seventy-seven".