678121066 has 8 divisors (see below), whose sum is σ = 1162493280. Its totient is φ = 290623308.

The previous prime is 678121049. The next prime is 678121111. The reversal of 678121066 is 660121876.

678121066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24218596 + ... + 24218623.

It is an arithmetic number, because the mean of its divisors is an integer number (145311660).

Almost surely, 2^678121066 is an apocalyptic number.

678121066 is a deficient number, since it is larger than the sum of its proper divisors (484372214).

678121066 is a wasteful number, since it uses less digits than its factorization.

678121066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48437228.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 678121066 is about 26040.7577846729. The cubic root of 678121066 is about 878.5552507501. Note that the first 3 decimals are identical.

The spelling of 678121066 in words is "six hundred seventy-eight million, one hundred twenty-one thousand, sixty-six".