66220153 has 2 divisors, whose sum is σ = 66220154. Its totient is φ = 66220152.

The previous prime is 66220109. The next prime is 66220157. The reversal of 66220153 is 35102266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44195904 + 22024249 = 6648^2 + 4693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66220153 is a prime.

It is not a weakly prime, because it can be changed into another prime (66220157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33110076 + 33110077.

It is an arithmetic number, because the mean of its divisors is an integer number (33110077).

Almost surely, 2^66220153 is an apocalyptic number.

It is an amenable number.

66220153 is a deficient number, since it is larger than the sum of its proper divisors (1).

66220153 is an equidigital number, since it uses as much as digits as its factorization.

66220153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66220153 is about 8137.5766048622. The cubic root of 66220153 is about 404.5728423199.

The spelling of 66220153 in words is "sixty-six million, two hundred twenty thousand, one hundred fifty-three".