6678450061779 has 4 divisors (see below), whose sum is σ = 8904600082376. Its totient is φ = 4452300041184.

The previous prime is 6678450061763. The next prime is 6678450061807. The reversal of 6678450061779 is 9771600548766.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6678450061779 - 2⁴ = 6678450061763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6678450061709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113075010294 + ... + 1113075010299.

It is an arithmetic number, because the mean of its divisors is an integer number (2226150020594).

Almost surely, 2^{6678450061779} is an apocalyptic number.

6678450061779 is a deficient number, since it is larger than the sum of its proper divisors (2226150020597).

6678450061779 is a wasteful number, since it uses less digits than its factorization.

6678450061779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226150020596.

The product of its (nonzero) digits is 106686720, while the sum is 66.

The spelling of 6678450061779 in words is "six trillion, six hundred seventy-eight billion, four hundred fifty million, sixty-one thousand, seven hundred seventy-nine".