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660013406 = 213171639161
BaseRepresentation
bin100111010101110…
…000000101011110
31200222221011011222
4213111300011132
52322430412111
6145254213342
722233010223
oct4725600536
91628834158
10660013406
11309618928
12165054252
13a697b9a0
146392994a
153ce247db
hex2757015e

660013406 has 32 divisors (see below), whose sum is σ = 1135941408. Its totient is φ = 284912640.

The previous prime is 660013381. The next prime is 660013411. The reversal of 660013406 is 604310066.

660013406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67466 + ... + 76626.

It is an arithmetic number, because the mean of its divisors is an integer number (35498169).

Almost surely, 2660013406 is an apocalyptic number.

660013406 is a deficient number, since it is larger than the sum of its proper divisors (475928002).

660013406 is a wasteful number, since it uses less digits than its factorization.

660013406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9356.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 660013406 is about 25690.7260699265. The cubic root of 660013406 is about 870.6646640529.

The spelling of 660013406 in words is "six hundred sixty million, thirteen thousand, four hundred six".

Divisors: 1 2 13 17 26 34 163 221 326 442 2119 2771 4238 5542 9161 18322 36023 72046 119093 155737 238186 311474 1493243 2024581 2986486 4049162 19412159 25385131 38824318 50770262 330006703 660013406