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6666620 = 225333331
BaseRepresentation
bin11001011011100101111100
3110112200212212
4121123211330
53201312440
6354515552
7110444132
oct31334574
913480785
106666620
113843804
122295bb8
1314c555c
14c57752
158ba465
hex65b97c

6666620 has 12 divisors (see below), whose sum is σ = 13999944. Its totient is φ = 2666640.

The previous prime is 6666617. The next prime is 6666679. The reversal of 6666620 is 266666.

6666620 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a nialpdrome in base 10.

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, 166646 + ... + 166685.

It is an arithmetic number, because the mean of its divisors is an integer number (1166662).

Almost surely, 26666620 is an apocalyptic number.

It is an amenable number.

6666620 is an abundant number, since it is smaller than the sum of its proper divisors (7333324).

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

6666620 is a wasteful number, since it uses less digits than its factorization.

6666620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333340 (or 333338 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 6666620 is about 2581.9798604947. The cubic root of 6666620 is about 188.2067666250.

The spelling of 6666620 in words is "six million, six hundred sixty-six thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 333331 666662 1333324 1666655 3333310 6666620