6749778 has 16 divisors (see below), whose sum is σ = 15428160. Its totient is φ = 1928496.

The previous prime is 6749767. The next prime is 6749783. The reversal of 6749778 is 8779476.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80313 + ... + 80396.

It is an arithmetic number, because the mean of its divisors is an integer number (964260).

Almost surely, 2^6749778 is an apocalyptic number.

6749778 is an abundant number, since it is smaller than the sum of its proper divisors (8678382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6749778 is a wasteful number, since it uses less digits than its factorization.

6749778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160721.

The product of its digits is 592704, while the sum is 48.

The square root of 6749778 is about 2598.0334870821. The cubic root of 6749778 is about 188.9860855913.

The spelling of 6749778 in words is "six million, seven hundred forty-nine thousand, seven hundred seventy-eight".