643060678 has 8 divisors (see below), whose sum is σ = 1038790368. Its totient is φ = 296797224.

The previous prime is 643060667. The next prime is 643060697. The reversal of 643060678 is 876060346.

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

It is a self number, because there is not a number n which added to its sum of digits gives 643060678.

It is a congruent number.

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, 12366526 + ... + 12366577.

It is an arithmetic number, because the mean of its divisors is an integer number (129848796).

Almost surely, 2^643060678 is an apocalyptic number.

643060678 is a deficient number, since it is larger than the sum of its proper divisors (395729690).

643060678 is a wasteful number, since it uses less digits than its factorization.

643060678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24733118.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 643060678 is about 25358.6410913519. The cubic root of 643060678 is about 863.1454483319.

The spelling of 643060678 in words is "six hundred forty-three million, sixty thousand, six hundred seventy-eight".