66213097 has 2 divisors, whose sum is σ = 66213098. Its totient is φ = 66213096.

The previous prime is 66213029. The next prime is 66213107. The reversal of 66213097 is 79031266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63936016 + 2277081 = 7996^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 66213097 - 2¹⁵ = 66180329 is a prime.

It is not a weakly prime, because it can be changed into another prime (66216097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33106548 + 33106549.

It is an arithmetic number, because the mean of its divisors is an integer number (33106549).

Almost surely, 2^66213097 is an apocalyptic number.

It is an amenable number.

66213097 is a deficient number, since it is larger than the sum of its proper divisors (1).

66213097 is an equidigital number, since it uses as much as digits as its factorization.

66213097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66213097 is about 8137.1430490068. The cubic root of 66213097 is about 404.5584722365.

The spelling of 66213097 in words is "sixty-six million, two hundred thirteen thousand, ninety-seven".