6712778 has 4 divisors (see below), whose sum is σ = 10069170. Its totient is φ = 3356388.

The previous prime is 6712753. The next prime is 6712787. The reversal of 6712778 is 8772176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5303809 + 1408969 = 2303^2 + 1187^2 .

It is a super-2 number, since 2×6712778² = 90122776954568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1678193 + ... + 1678196.

Almost surely, 2^6712778 is an apocalyptic number.

6712778 is a deficient number, since it is larger than the sum of its proper divisors (3356392).

6712778 is a wasteful number, since it uses less digits than its factorization.

6712778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356391.

The product of its digits is 32928, while the sum is 38.

The square root of 6712778 is about 2590.9029314121. The cubic root of 6712778 is about 188.6401334216.

The spelling of 6712778 in words is "six million, seven hundred twelve thousand, seven hundred seventy-eight".