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66065461 = 7113723189
BaseRepresentation
bin1111110000000…
…1010000110101
311121022110202221
43330001100311
5113403043321
610320002341
71431355450
oct374012065
9147273687
1066065461
1134323a60
121a1603b1
13108c19b7
148aba497
155beee41
hex3f01435

66065461 has 16 divisors (see below), whose sum is σ = 84597120. Its totient is φ = 50086080.

The previous prime is 66065437. The next prime is 66065471. The reversal of 66065461 is 16456066.

It is not a de Polignac number, because 66065461 - 219 = 65541173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66065431) 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, 8746 + ... + 14443.

It is an arithmetic number, because the mean of its divisors is an integer number (5287320).

Almost surely, 266065461 is an apocalyptic number.

It is an amenable number.

66065461 is a deficient number, since it is larger than the sum of its proper divisors (18531659).

66065461 is a wasteful number, since it uses less digits than its factorization.

66065461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23244.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 66065461 is about 8128.0662521906. The cubic root of 66065461 is about 404.2575657996.

The spelling of 66065461 in words is "sixty-six million, sixty-five thousand, four hundred sixty-one".

Divisors: 1 7 11 37 77 259 407 2849 23189 162323 255079 857993 1785553 6005951 9437923 66065461