6749978 has 12 divisors (see below), whose sum is σ = 10687050. Its totient is φ = 3197016.

The previous prime is 6749933. The next prime is 6749983. The reversal of 6749978 is 8799476.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4609609 + 2140369 = 2147^2 + 1463^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3953 + ... + 5396.

Almost surely, 2^6749978 is an apocalyptic number.

6749978 is a deficient number, since it is larger than the sum of its proper divisors (3937072).

6749978 is a wasteful number, since it uses less digits than its factorization.

6749978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9389 (or 9370 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 6749978 is about 2598.0719774479. The cubic root of 6749978 is about 188.9879521635.

The spelling of 6749978 in words is "six million, seven hundred forty-nine thousand, nine hundred seventy-eight".