1665222043 has 2 divisors, whose sum is σ = 1665222044. Its totient is φ = 1665222042.

The previous prime is 1665222023. The next prime is 1665222067. The reversal of 1665222043 is 3402225661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1665222043 - 2⁹ = 1665221531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1665221996 and 1665222014.

It is not a weakly prime, because it can be changed into another prime (1665222023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832611021 + 832611022.

It is an arithmetic number, because the mean of its divisors is an integer number (832611022).

Almost surely, 2^1665222043 is an apocalyptic number.

1665222043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665222043 is an equidigital number, since it uses as much as digits as its factorization.

1665222043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1665222043 is about 40807.1322565063. The cubic root of 1665222043 is about 1185.2884443256.

The spelling of 1665222043 in words is "one billion, six hundred sixty-five million, two hundred twenty-two thousand, forty-three".