66298549 has 2 divisors, whose sum is σ = 66298550. Its totient is φ = 66298548.

The previous prime is 66298541. The next prime is 66298567. The reversal of 66298549 is 94589266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63123025 + 3175524 = 7945^2 + 1782^2 .

It is a cyclic number.

It is not a de Polignac number, because 66298549 - 2³ = 66298541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66298541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33149274 + 33149275.

It is an arithmetic number, because the mean of its divisors is an integer number (33149275).

Almost surely, 2^66298549 is an apocalyptic number.

It is an amenable number.

66298549 is a deficient number, since it is larger than the sum of its proper divisors (1).

66298549 is an equidigital number, since it uses as much as digits as its factorization.

66298549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 66298549 is about 8142.3920932365. The cubic root of 66298549 is about 404.7324331349.

The spelling of 66298549 in words is "sixty-six million, two hundred ninety-eight thousand, five hundred forty-nine".