6773978 has 4 divisors (see below), whose sum is σ = 10160970. Its totient is φ = 3386988.

The previous prime is 6773959. The next prime is 6773999. The reversal of 6773978 is 8793776.

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., 4592449 + 2181529 = 2143^2 + 1477^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1693493 + ... + 1693496.

Almost surely, 2^6773978 is an apocalyptic number.

6773978 is a deficient number, since it is larger than the sum of its proper divisors (3386992).

6773978 is a wasteful number, since it uses less digits than its factorization.

6773978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386991.

The product of its digits is 444528, while the sum is 47.

The square root of 6773978 is about 2602.6866887891. The cubic root of 6773978 is about 189.2116736715.

It can be divided in two parts, 67 and 73978, that multiplied together give a triangular number (4956526 = T₃₁₄₈).

The spelling of 6773978 in words is "six million, seven hundred seventy-three thousand, nine hundred seventy-eight".