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66683977 = 1924114563
BaseRepresentation
bin1111111001100…
…0010001001001
311122110220012221
43332120101021
5114032341402
610341134041
71436542633
oct376302111
9148426187
1066683977
1134706728
121a3ba321
1310a7a399
148bdba53
155cc3337
hex3f98449

66683977 has 8 divisors (see below), whose sum is σ = 70489760. Its totient is φ = 62907840.

The previous prime is 66683971. The next prime is 66683989. The reversal of 66683977 is 77938666.

66683977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66683977 - 27 = 66683849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66683971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2703 + ... + 11860.

It is an arithmetic number, because the mean of its divisors is an integer number (8811220).

Almost surely, 266683977 is an apocalyptic number.

It is an amenable number.

66683977 is a deficient number, since it is larger than the sum of its proper divisors (3805783).

66683977 is a wasteful number, since it uses less digits than its factorization.

66683977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14823.

The product of its digits is 2286144, while the sum is 52.

The square root of 66683977 is about 8166.0257775738. The cubic root of 66683977 is about 405.5152249825.

The spelling of 66683977 in words is "sixty-six million, six hundred eighty-three thousand, nine hundred seventy-seven".

Divisors: 1 19 241 4579 14563 276697 3509683 66683977