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66283705 = 5294191091
BaseRepresentation
bin1111110011011…
…0100010111001
311121201120011001
43330312202321
5113432034310
610324405001
71433254645
oct374664271
9147646131
1066283705
1134462a24
121a246761
131096a137
148b35c25
155c4493a
hex3f368b9

66283705 has 16 divisors (see below), whose sum is σ = 82555200. Its totient is φ = 51029440.

The previous prime is 66283699. The next prime is 66283709. The reversal of 66283705 is 50738266.

It is not a de Polignac number, because 66283705 - 27 = 66283577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66283709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60210 + ... + 61300.

It is an arithmetic number, because the mean of its divisors is an integer number (5159700).

Almost surely, 266283705 is an apocalyptic number.

It is an amenable number.

66283705 is a deficient number, since it is larger than the sum of its proper divisors (16271495).

66283705 is a wasteful number, since it uses less digits than its factorization.

66283705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 66283705 is about 8141.4805164663. The cubic root of 66283705 is about 404.7022248485.

The spelling of 66283705 in words is "sixty-six million, two hundred eighty-three thousand, seven hundred five".

Divisors: 1 5 29 145 419 1091 2095 5455 12151 31639 60755 158195 457129 2285645 13256741 66283705