1066650019 has 2 divisors, whose sum is σ = 1066650020. Its totient is φ = 1066650018.

The previous prime is 1066650017. The next prime is 1066650031. The reversal of 1066650019 is 9100566601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1066650019 - 2¹ = 1066650017 is a prime.

It is a super-2 number, since 2×1066650019² = 2275484526065400722, which contains 22 as substring.

Together with 1066650017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1066650017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533325009 + 533325010.

It is an arithmetic number, because the mean of its divisors is an integer number (533325010).

Almost surely, 2^1066650019 is an apocalyptic number.

1066650019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066650019 is an equidigital number, since it uses as much as digits as its factorization.

1066650019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1066650019 is about 32659.6083718100. The cubic root of 1066650019 is about 1021.7405943038.

The spelling of 1066650019 in words is "one billion, sixty-six million, six hundred fifty thousand, nineteen".