66021359 has 2 divisors, whose sum is σ = 66021360. Its totient is φ = 66021358.

The previous prime is 66021349. The next prime is 66021367. The reversal of 66021359 is 95312066.

It is a happy number.

66021359 is nontrivially palindromic in base 4.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66021359 - 2²⁰ = 64972783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66021349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33010679 + 33010680.

It is an arithmetic number, because the mean of its divisors is an integer number (33010680).

Almost surely, 2^66021359 is an apocalyptic number.

66021359 is a deficient number, since it is larger than the sum of its proper divisors (1).

66021359 is an equidigital number, since it uses as much as digits as its factorization.

66021359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 66021359 is about 8125.3528538766. The cubic root of 66021359 is about 404.1675917268.

The spelling of 66021359 in words is "sixty-six million, twenty-one thousand, three hundred fifty-nine".