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66860429 is a prime number
BaseRepresentation
bin1111111100001…
…1010110001101
311122210212021012
43333003112031
5114104013204
610345015005
71441206236
oct377032615
9148725235
1066860429
1134817259
121a484465
1310b0c7ac
148c4608d
155d0a76e
hex3fc358d

66860429 has 2 divisors, whose sum is σ = 66860430. Its totient is φ = 66860428.

The previous prime is 66860419. The next prime is 66860467. The reversal of 66860429 is 92406866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66797929 + 62500 = 8173^2 + 250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-66860429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66860419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33430214 + 33430215.

It is an arithmetic number, because the mean of its divisors is an integer number (33430215).

Almost surely, 266860429 is an apocalyptic number.

It is an amenable number.

66860429 is a deficient number, since it is larger than the sum of its proper divisors (1).

66860429 is an equidigital number, since it uses as much as digits as its factorization.

66860429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 66860429 is about 8176.8226714293. The cubic root of 66860429 is about 405.8725869530.

The spelling of 66860429 in words is "sixty-six million, eight hundred sixty thousand, four hundred twenty-nine".