6676992778 has 16 divisors (see below), whose sum is σ = 10182551400. Its totient is φ = 3282840000.

The previous prime is 6676992767. The next prime is 6676992797. The reversal of 6676992778 is 8772996766.

It can be written as a sum of positive squares in 4 ways, for example, as 5554273729 + 1122719049 = 74527^2 + 33507^2 .

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, 666148 + ... + 676096.

Almost surely, 2^6676992778 is an apocalyptic number.

6676992778 is a deficient number, since it is larger than the sum of its proper divisors (3505558622).

6676992778 is a wasteful number, since it uses less digits than its factorization.

6676992778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15513.

The product of its digits is 96018048, while the sum is 67.

The square root of 6676992778 is about 81712.8678850522. The cubic root of 6676992778 is about 1883.0432807670.

The spelling of 6676992778 in words is "six billion, six hundred seventy-six million, nine hundred ninety-two thousand, seven hundred seventy-eight".