66149383 has 2 divisors, whose sum is σ = 66149384. Its totient is φ = 66149382.

The previous prime is 66149333. The next prime is 66149387. The reversal of 66149383 is 38394166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66149383 - 2⁹ = 66148871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66149387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33074691 + 33074692.

It is an arithmetic number, because the mean of its divisors is an integer number (33074692).

Almost surely, 2^66149383 is an apocalyptic number.

66149383 is a deficient number, since it is larger than the sum of its proper divisors (1).

66149383 is an equidigital number, since it uses as much as digits as its factorization.

66149383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 66149383 is about 8133.2270963007. The cubic root of 66149383 is about 404.4286675512.

The spelling of 66149383 in words is "sixty-six million, one hundred forty-nine thousand, three hundred eighty-three".