678678550 has 48 divisors (see below), whose sum is σ = 1393785792. Its totient is φ = 243802400.

The previous prime is 678678547. The next prime is 678678551. The reversal of 678678550 is 55876876.

It is a super-3 number, since 3×678678550³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678678551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38217 + ... + 53083.

It is an arithmetic number, because the mean of its divisors is an integer number (29037204).

Almost surely, 2^678678550 is an apocalyptic number.

678678550 is an abundant number, since it is smaller than the sum of its proper divisors (715107242).

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

678678550 is a wasteful number, since it uses less digits than its factorization.

678678550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14973 (or 14968 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 52.

The square root of 678678550 is about 26051.4596520041. The cubic root of 678678550 is about 878.7959385195.

The spelling of 678678550 in words is "six hundred seventy-eight million, six hundred seventy-eight thousand, five hundred fifty".