66486653 has 2 divisors, whose sum is σ = 66486654. Its totient is φ = 66486652.

The previous prime is 66486617. The next prime is 66486689. The reversal of 66486653 is 35668466.

It is a balanced prime because it is at equal distance from previous prime (66486617) and next prime (66486689).

It can be written as a sum of positive squares in only one way, i.e., 41306329 + 25180324 = 6427^2 + 5018^2 .

It is a cyclic number.

It is not a de Polignac number, because 66486653 - 2²⁰ = 65438077 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 (66486053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33243326 + 33243327.

It is an arithmetic number, because the mean of its divisors is an integer number (33243327).

Almost surely, 2^66486653 is an apocalyptic number.

It is an amenable number.

66486653 is a deficient number, since it is larger than the sum of its proper divisors (1).

66486653 is an equidigital number, since it uses as much as digits as its factorization.

66486653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 44.

The square root of 66486653 is about 8153.9348170071. The cubic root of 66486653 is about 405.1148442282.

The spelling of 66486653 in words is "sixty-six million, four hundred eighty-six thousand, six hundred fifty-three".