Search a number
-
+
66999983 is a prime number
BaseRepresentation
bin1111111110010…
…1011010101111
311200001221200212
43333211122233
5114122444413
610352013035
71442330141
oct377453257
9150057625
1066999983
1134902096
121a53117b
1310b5b17b
148c80c91
155d36ca8
hex3fe56af

66999983 has 2 divisors, whose sum is σ = 66999984. Its totient is φ = 66999982.

The previous prime is 66999953. The next prime is 66999997. The reversal of 66999983 is 38999966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66999983 - 28 = 66999727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66999913) 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 as a sum of consecutive naturals, namely, 33499991 + 33499992.

It is an arithmetic number, because the mean of its divisors is an integer number (33499992).

Almost surely, 266999983 is an apocalyptic number.

66999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

66999983 is an equidigital number, since it uses as much as digits as its factorization.

66999983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 59.

The square root of 66999983 is about 8185.3517334321. The cubic root of 66999983 is about 406.1547756932.

The spelling of 66999983 in words is "sixty-six million, nine hundred ninety-nine thousand, nine hundred eighty-three".