6678456784457 has 8 divisors (see below), whose sum is σ = 6713494824960. Its totient is φ = 6643419497440.

The previous prime is 6678456784393. The next prime is 6678456784507. The reversal of 6678456784457 is 7544876548766.

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

It is a cyclic number.

It is not a de Polignac number, because 6678456784457 - 2⁶ = 6678456784393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6678456784057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31661813 + ... + 31872045.

It is an arithmetic number, because the mean of its divisors is an integer number (839186853120).

Almost surely, 2^{6678456784457} is an apocalyptic number.

It is an amenable number.

6678456784457 is a deficient number, since it is larger than the sum of its proper divisors (35038040503).

6678456784457 is a wasteful number, since it uses less digits than its factorization.

6678456784457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376743.

The product of its digits is 7586611200, while the sum is 77.

The spelling of 6678456784457 in words is "six trillion, six hundred seventy-eight billion, four hundred fifty-six million, seven hundred eighty-four thousand, four hundred fifty-seven".