66216053 has 2 divisors, whose sum is σ = 66216054. Its totient is φ = 66216052.

The previous prime is 66216041. The next prime is 66216097. The reversal of 66216053 is 35061266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34597924 + 31618129 = 5882^2 + 5623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66216053 is a prime.

It is a super-3 number, since 3×66216053³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66216013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33108026 + 33108027.

It is an arithmetic number, because the mean of its divisors is an integer number (33108027).

Almost surely, 2^66216053 is an apocalyptic number.

It is an amenable number.

66216053 is a deficient number, since it is larger than the sum of its proper divisors (1).

66216053 is an equidigital number, since it uses as much as digits as its factorization.

66216053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66216053 is about 8137.3246832113. The cubic root of 66216053 is about 404.5644924807.

The spelling of 66216053 in words is "sixty-six million, two hundred sixteen thousand, fifty-three".