66620083 has 2 divisors, whose sum is σ = 66620084. Its totient is φ = 66620082.

The previous prime is 66620077. The next prime is 66620087. The reversal of 66620083 is 38002666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66620083 is a prime.

It is not a weakly prime, because it can be changed into another prime (66620087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33310041 + 33310042.

It is an arithmetic number, because the mean of its divisors is an integer number (33310042).

Almost surely, 2^66620083 is an apocalyptic number.

66620083 is a deficient number, since it is larger than the sum of its proper divisors (1).

66620083 is an equidigital number, since it uses as much as digits as its factorization.

66620083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66620083 is about 8162.1126554343. The cubic root of 66620083 is about 405.3856672752.

The spelling of 66620083 in words is "sixty-six million, six hundred twenty thousand, eighty-three".