9780668 has 12 divisors (see below), whose sum is σ = 18017160. Its totient is φ = 4632912.

The previous prime is 9780647. The next prime is 9780721. The reversal of 9780668 is 8660879.

It is a super-2 number, since 2×9780668² = 191322933052448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64271 + ... + 64422.

It is an arithmetic number, because the mean of its divisors is an integer number (1501430).

Almost surely, 2^9780668 is an apocalyptic number.

It is an amenable number.

9780668 is a deficient number, since it is larger than the sum of its proper divisors (8236492).

9780668 is a wasteful number, since it uses less digits than its factorization.

9780668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128716 (or 128714 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 9780668 is about 3127.4059538218. The cubic root of 9780668 is about 213.8566892127.

The spelling of 9780668 in words is "nine million, seven hundred eighty thousand, six hundred sixty-eight".