668798830 has 48 divisors (see below), whose sum is σ = 1438313184. Its totient is φ = 219320640.

The previous prime is 668798789. The next prime is 668798833. The reversal of 668798830 is 38897866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668798833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28000 + ... + 46060.

It is an arithmetic number, because the mean of its divisors is an integer number (29964858).

Almost surely, 2^668798830 is an apocalyptic number.

668798830 is an abundant number, since it is smaller than the sum of its proper divisors (769514354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668798830 is a wasteful number, since it uses less digits than its factorization.

668798830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18121 (or 18098 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 668798830 is about 25861.1451795933. The cubic root of 668798830 is about 874.5107817639.

The spelling of 668798830 in words is "six hundred sixty-eight million, seven hundred ninety-eight thousand, eight hundred thirty".