668780830 has 8 divisors (see below), whose sum is σ = 1203805512. Its totient is φ = 267512328.

The previous prime is 668780771. The next prime is 668780837. The reversal of 668780830 is 38087866.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668780837) by changing a digit.

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, 33439032 + ... + 33439051.

It is an arithmetic number, because the mean of its divisors is an integer number (150475689).

Almost surely, 2^668780830 is an apocalyptic number.

668780830 is a deficient number, since it is larger than the sum of its proper divisors (535024682).

668780830 is a wasteful number, since it uses less digits than its factorization.

668780830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66878090.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 668780830 is about 25860.7971648207. The cubic root of 668780830 is about 874.5029361884.

The spelling of 668780830 in words is "six hundred sixty-eight million, seven hundred eighty thousand, eight hundred thirty".