6678665396 has 24 divisors (see below), whose sum is σ = 12622406664. Its totient is φ = 3073720320.

The previous prime is 6678665387. The next prime is 6678665417. The reversal of 6678665396 is 6935668766.

It can be written as a sum of positive squares in 4 ways, for example, as 198415396 + 6480250000 = 14086^2 + 80500^2 .

It is a congruent number.

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, 163565 + ... + 200276.

It is an arithmetic number, because the mean of its divisors is an integer number (525933611).

Almost surely, 2^6678665396 is an apocalyptic number.

It is an amenable number.

6678665396 is a deficient number, since it is larger than the sum of its proper divisors (5943741268).

6678665396 is a wasteful number, since it uses less digits than its factorization.

6678665396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364211 (or 364209 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 62.

The square root of 6678665396 is about 81723.1019724533. The cubic root of 6678665396 is about 1883.2005046965.

The spelling of 6678665396 in words is "six billion, six hundred seventy-eight million, six hundred sixty-five thousand, three hundred ninety-six".