66366941 has 2 divisors, whose sum is σ = 66366942. Its totient is φ = 66366940.

The previous prime is 66366919. The next prime is 66366959. The reversal of 66366941 is 14966366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33304441 + 33062500 = 5771^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 66366941 - 2²² = 62172637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66366991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33183470 + 33183471.

It is an arithmetic number, because the mean of its divisors is an integer number (33183471).

Almost surely, 2^66366941 is an apocalyptic number.

It is an amenable number.

66366941 is a deficient number, since it is larger than the sum of its proper divisors (1).

66366941 is an equidigital number, since it uses as much as digits as its factorization.

66366941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 66366941 is about 8146.5907593299. The cubic root of 66366941 is about 404.8715560783.

The spelling of 66366941 in words is "sixty-six million, three hundred sixty-six thousand, nine hundred forty-one".