6996778 has 8 divisors (see below), whose sum is σ = 10507140. Its totient is φ = 3494400.

The previous prime is 6996739. The next prime is 6996823. The reversal of 6996778 is 8776996.

It can be written as a sum of positive squares in 2 ways, for example, as 4297329 + 2699449 = 2073^2 + 1643^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1258 + ... + 3946.

Almost surely, 2^6996778 is an apocalyptic number.

6996778 is a deficient number, since it is larger than the sum of its proper divisors (3510362).

6996778 is a wasteful number, since it uses less digits than its factorization.

6996778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its digits is 1143072, while the sum is 52.

The square root of 6996778 is about 2645.1423402154. The cubic root of 6996778 is about 191.2637639431.

The spelling of 6996778 in words is "six million, nine hundred ninety-six thousand, seven hundred seventy-eight".