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6668863 = 43115473
BaseRepresentation
bin11001011100001000111111
3110112210221221
4121130020333
53201400423
6354534211
7110453515
oct31341077
913483857
106668863
113845463
122297367
1314c6596
14c584b5
158bae5d
hex65c23f

6668863 has 4 divisors (see below), whose sum is σ = 6684768. Its totient is φ = 6652960.

The previous prime is 6668861. The next prime is 6668881. The reversal of 6668863 is 3688666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3688666 = 21844333.

It is a cyclic number.

It is not a de Polignac number, because 6668863 - 21 = 6668861 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7306 + ... + 8167.

It is an arithmetic number, because the mean of its divisors is an integer number (1671192).

Almost surely, 26668863 is an apocalyptic number.

6668863 is a deficient number, since it is larger than the sum of its proper divisors (15905).

6668863 is a wasteful number, since it uses less digits than its factorization.

6668863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15904.

The product of its digits is 248832, while the sum is 43.

The square root of 6668863 is about 2582.4141805683. The cubic root of 6668863 is about 188.2278717949.

The spelling of 6668863 in words is "six million, six hundred sixty-eight thousand, eight hundred sixty-three".

Divisors: 1 431 15473 6668863