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66955966 = 27111972207
BaseRepresentation
bin1111111101101…
…0101010111110
311122222201022121
43333122222332
5114120042331
610351033154
71442054620
oct377325276
9148881277
1066955966
1134882010
121a50b7ba
1310b4411c
148c6cc10
155d28c11
hex3fdaabe

66955966 has 32 divisors (see below), whose sum is σ = 125908992. Its totient is φ = 25942560.

The previous prime is 66955963. The next prime is 66955991.

It is a happy number.

66955966 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66955963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29235 + ... + 31441.

It is an arithmetic number, because the mean of its divisors is an integer number (3934656).

Almost surely, 266955966 is an apocalyptic number.

66955966 is a deficient number, since it is larger than the sum of its proper divisors (58953026).

66955966 is a wasteful number, since it uses less digits than its factorization.

66955966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424.

The product of its digits is 2624400, while the sum is 52.

The square root of 66955966 is about 8182.6625251198. The cubic root of 66955966 is about 406.0658123311.

The spelling of 66955966 in words is "sixty-six million, nine hundred fifty-five thousand, nine hundred sixty-six".

Divisors: 1 2 7 11 14 22 77 154 197 394 1379 2167 2207 2758 4334 4414 15169 15449 24277 30338 30898 48554 169939 339878 434779 869558 3043453 4782569 6086906 9565138 33477983 66955966