66750053 has 2 divisors, whose sum is σ = 66750054. Its totient is φ = 66750052.

The previous prime is 66750029. The next prime is 66750113. The reversal of 66750053 is 35005766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45387169 + 21362884 = 6737^2 + 4622^2 .

It is a cyclic number.

It is not a de Polignac number, because 66750053 - 2¹⁶ = 66684517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66750253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33375026 + 33375027.

It is an arithmetic number, because the mean of its divisors is an integer number (33375027).

Almost surely, 2^66750053 is an apocalyptic number.

It is an amenable number.

66750053 is a deficient number, since it is larger than the sum of its proper divisors (1).

66750053 is an equidigital number, since it uses as much as digits as its factorization.

66750053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 66750053 is about 8170.0705627308. The cubic root of 66750053 is about 405.6491201094.

The spelling of 66750053 in words is "sixty-six million, seven hundred fifty thousand, fifty-three".