6578332666 has 8 divisors (see below), whose sum is σ = 9874389204. Its totient is φ = 3286869600.

The previous prime is 6578332661. The next prime is 6578332669. The reversal of 6578332666 is 6662338756.

It can be written as a sum of positive squares in 2 ways, for example, as 5295618441 + 1282714225 = 72771^2 + 35815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6578332661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144785 + ... + 1150516.

Almost surely, 2^6578332666 is an apocalyptic number.

6578332666 is a deficient number, since it is larger than the sum of its proper divisors (3296056538).

6578332666 is a wasteful number, since it uses less digits than its factorization.

6578332666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296736.

The product of its digits is 6531840, while the sum is 52.

The square root of 6578332666 is about 81106.9211966525. The cubic root of 6578332666 is about 1873.7225233432.

The spelling of 6578332666 in words is "six billion, five hundred seventy-eight million, three hundred thirty-two thousand, six hundred sixty-six".