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9980666 = 2172312763
BaseRepresentation
bin100110000100…
…101011111010
3200210001220022
4212010223322
510023340131
6553530442
7150556103
oct46045372
920701808
109980666
1156a7693
123413a22
1320b5b27
14147b3aa
15d2237b
hex984afa

9980666 has 16 divisors (see below), whose sum is σ = 16542144. Its totient is φ = 4492224.

The previous prime is 9980629. The next prime is 9980693. The reversal of 9980666 is 6660899.

9980666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×99806664 (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5600 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (1033884).

Almost surely, 29980666 is an apocalyptic number.

9980666 is a deficient number, since it is larger than the sum of its proper divisors (6561478).

9980666 is a wasteful number, since it uses less digits than its factorization.

9980666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 9980666 is about 3159.2192073359. The cubic root of 9980666 is about 215.3045332909.

The spelling of 9980666 in words is "nine million, nine hundred eighty thousand, six hundred sixty-six".

Divisors: 1 2 17 23 34 46 391 782 12763 25526 216971 293549 433942 587098 4990333 9980666