66950449 has 2 divisors, whose sum is σ = 66950450. Its totient is φ = 66950448.

The previous prime is 66950431. The next prime is 66950459. The reversal of 66950449 is 94405966.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45495025 + 21455424 = 6745^2 + 4632^2 .

It is a cyclic number.

It is not a de Polignac number, because 66950449 - 2²¹ = 64853297 is a prime.

It is not a weakly prime, because it can be changed into another prime (66950459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33475224 + 33475225.

It is an arithmetic number, because the mean of its divisors is an integer number (33475225).

Almost surely, 2^66950449 is an apocalyptic number.

It is an amenable number.

66950449 is a deficient number, since it is larger than the sum of its proper divisors (1).

66950449 is an equidigital number, since it uses as much as digits as its factorization.

66950449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 66950449 is about 8182.3254029646. The cubic root of 66950449 is about 406.0546590974.

The spelling of 66950449 in words is "sixty-six million, nine hundred fifty thousand, four hundred forty-nine".