664827766 has 8 divisors (see below), whose sum is σ = 1024194240. Its totient is φ = 323429688.

The previous prime is 664827731. The next prime is 664827797. The reversal of 664827766 is 667728466.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4492006 + ... + 4492153.

It is an arithmetic number, because the mean of its divisors is an integer number (128024280).

Almost surely, 2^664827766 is an apocalyptic number.

664827766 is a deficient number, since it is larger than the sum of its proper divisors (359366474).

664827766 is a wasteful number, since it uses less digits than its factorization.

664827766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8984198.

The product of its digits is 4064256, while the sum is 52.

The square root of 664827766 is about 25784.2542261745. The cubic root of 664827766 is about 872.7765112378.

The spelling of 664827766 in words is "six hundred sixty-four million, eight hundred twenty-seven thousand, seven hundred sixty-six".