66606053 has 2 divisors, whose sum is σ = 66606054. Its totient is φ = 66606052.

The previous prime is 66606049. The next prime is 66606061. The reversal of 66606053 is 35060666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50098084 + 16507969 = 7078^2 + 4063^2 .

It is a cyclic number.

It is not a de Polignac number, because 66606053 - 2² = 66606049 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 (66606013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33303026 + 33303027.

It is an arithmetic number, because the mean of its divisors is an integer number (33303027).

Almost surely, 2^66606053 is an apocalyptic number.

It is an amenable number.

66606053 is a deficient number, since it is larger than the sum of its proper divisors (1).

66606053 is an equidigital number, since it uses as much as digits as its factorization.

66606053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 66606053 is about 8161.2531513242. The cubic root of 66606053 is about 405.3572075878.

The spelling of 66606053 in words is "sixty-six million, six hundred six thousand, fifty-three".