6678400129 has 8 divisors (see below), whose sum is σ = 6970211712. Its totient is φ = 6386709120.

The previous prime is 6678400123. The next prime is 6678400147. The reversal of 6678400129 is 9210048766.

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 6678400129 - 2²⁹ = 6141529217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6678400123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93972 + ... + 148954.

It is an arithmetic number, because the mean of its divisors is an integer number (871276464).

Almost surely, 2^6678400129 is an apocalyptic number.

It is an amenable number.

6678400129 is a deficient number, since it is larger than the sum of its proper divisors (291811583).

6678400129 is a wasteful number, since it uses less digits than its factorization.

6678400129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60287.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 6678400129 is about 81721.4789942032. The cubic root of 6678400129 is about 1883.1755716930.

The spelling of 6678400129 in words is "six billion, six hundred seventy-eight million, four hundred thousand, one hundred twenty-nine".