678552654 has 64 divisors (see below), whose sum is σ = 1573024320. Its totient is φ = 193259520.

The previous prime is 678552607. The next prime is 678552697. The reversal of 678552654 is 456255876.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76692 + ... + 85080.

It is an arithmetic number, because the mean of its divisors is an integer number (24578505).

Almost surely, 2^678552654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678552654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786512160).

678552654 is an abundant number, since it is smaller than the sum of its proper divisors (894471666).

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

678552654 is a wasteful number, since it uses less digits than its factorization.

678552654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485.

The product of its digits is 2016000, while the sum is 48.

The square root of 678552654 is about 26049.0432453862. The cubic root of 678552654 is about 878.7415957897.

The spelling of 678552654 in words is "six hundred seventy-eight million, five hundred fifty-two thousand, six hundred fifty-four".