66323461 has 2 divisors, whose sum is σ = 66323462. Its totient is φ = 66323460.

The previous prime is 66323417. The next prime is 66323473. The reversal of 66323461 is 16432366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65707236 + 616225 = 8106^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 66323461 - 2²³ = 57934853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66323401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33161730 + 33161731.

It is an arithmetic number, because the mean of its divisors is an integer number (33161731).

Almost surely, 2^66323461 is an apocalyptic number.

It is an amenable number.

66323461 is a deficient number, since it is larger than the sum of its proper divisors (1).

66323461 is an equidigital number, since it uses as much as digits as its factorization.

66323461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 66323461 is about 8143.9217211366. The cubic root of 66323461 is about 404.7831201756.

The spelling of 66323461 in words is "sixty-six million, three hundred twenty-three thousand, four hundred sixty-one".