66201097 has 2 divisors, whose sum is σ = 66201098. Its totient is φ = 66201096.

The previous prime is 66201053. The next prime is 66201143. The reversal of 66201097 is 79010266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55890576 + 10310521 = 7476^2 + 3211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66201097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66201017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33100548 + 33100549.

It is an arithmetic number, because the mean of its divisors is an integer number (33100549).

Almost surely, 2^66201097 is an apocalyptic number.

It is an amenable number.

66201097 is a deficient number, since it is larger than the sum of its proper divisors (1).

66201097 is an equidigital number, since it uses as much as digits as its factorization.

66201097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 66201097 is about 8136.4056560621. The cubic root of 66201097 is about 404.5340309744.

The spelling of 66201097 in words is "sixty-six million, two hundred one thousand, ninety-seven".