66530441 has 2 divisors, whose sum is σ = 66530442. Its totient is φ = 66530440.

The previous prime is 66530411. The next prime is 66530447. The reversal of 66530441 is 14403566.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65674816 + 855625 = 8104^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 66530441 - 2⁶ = 66530377 is a prime.

It is not a weakly prime, because it can be changed into another prime (66530447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33265220 + 33265221.

It is an arithmetic number, because the mean of its divisors is an integer number (33265221).

Almost surely, 2^66530441 is an apocalyptic number.

It is an amenable number.

66530441 is a deficient number, since it is larger than the sum of its proper divisors (1).

66530441 is an equidigital number, since it uses as much as digits as its factorization.

66530441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66530441 is about 8156.6194590651. The cubic root of 66530441 is about 405.2037607004.

The spelling of 66530441 in words is "sixty-six million, five hundred thirty thousand, four hundred forty-one".