6656369738 has 4 divisors (see below), whose sum is σ = 9984554610. Its totient is φ = 3328184868.

The previous prime is 6656369683. The next prime is 6656369749. The reversal of 6656369738 is 8379636566.

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., 6571858489 + 84511249 = 81067^2 + 9193^2 .

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 1664092433 + ... + 1664092436.

Almost surely, 2^6656369738 is an apocalyptic number.

6656369738 is a deficient number, since it is larger than the sum of its proper divisors (3328184872).

6656369738 is a wasteful number, since it uses less digits than its factorization.

6656369738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328184871.

The product of its digits is 29393280, while the sum is 59.

The square root of 6656369738 is about 81586.5781731285. The cubic root of 6656369738 is about 1881.1025803724.

The spelling of 6656369738 in words is "six billion, six hundred fifty-six million, three hundred sixty-nine thousand, seven hundred thirty-eight".