6426778 has 8 divisors (see below), whose sum is σ = 9776160. Its totient is φ = 3168060.

The previous prime is 6426757. The next prime is 6426781. The reversal of 6426778 is 8776246.

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

It is a super-2 number, since 2×6426778² = 82606950922568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6426778.

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, 22488 + ... + 22771.

It is an arithmetic number, because the mean of its divisors is an integer number (1222020).

Almost surely, 2^6426778 is an apocalyptic number.

6426778 is a deficient number, since it is larger than the sum of its proper divisors (3349382).

6426778 is a wasteful number, since it uses less digits than its factorization.

6426778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45332.

The product of its digits is 112896, while the sum is 40.

The square root of 6426778 is about 2535.1090706319. The cubic root of 6426778 is about 185.9221356746.

The spelling of 6426778 in words is "six million, four hundred twenty-six thousand, seven hundred seventy-eight".