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66164653 is a prime number
BaseRepresentation
bin1111110001100…
…1011110101101
311121111111211201
43330121132231
5113414232103
610322045501
71432250602
oct374313655
9147444751
1066164653
1134391535
121a1a9891
1310927ba9
148b046a9
155c1e51d
hex3f197ad

66164653 has 2 divisors, whose sum is σ = 66164654. Its totient is φ = 66164652.

The previous prime is 66164641. The next prime is 66164671. The reversal of 66164653 is 35646166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36156169 + 30008484 = 6013^2 + 5478^2 .

It is a cyclic number.

It is not a de Polignac number, because 66164653 - 29 = 66164141 is a prime.

It is a super-2 number, since 2×661646532 = 8755522613220818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66164053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33082326 + 33082327.

It is an arithmetic number, because the mean of its divisors is an integer number (33082327).

Almost surely, 266164653 is an apocalyptic number.

It is an amenable number.

66164653 is a deficient number, since it is larger than the sum of its proper divisors (1).

66164653 is an equidigital number, since it uses as much as digits as its factorization.

66164653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 66164653 is about 8134.1657839019. The cubic root of 66164653 is about 404.4597847506.

The spelling of 66164653 in words is "sixty-six million, one hundred sixty-four thousand, six hundred fifty-three".