1662066239 has 2 divisors, whose sum is σ = 1662066240. Its totient is φ = 1662066238.

The previous prime is 1662066223. The next prime is 1662066317. The reversal of 1662066239 is 9326602661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1662066239 - 2⁴ = 1662066223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662066196 and 1662066205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662063239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831033119 + 831033120.

It is an arithmetic number, because the mean of its divisors is an integer number (831033120).

Almost surely, 2^1662066239 is an apocalyptic number.

1662066239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662066239 is an equidigital number, since it uses as much as digits as its factorization.

1662066239 is an evil number, because the sum of its binary digits is even.

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

The square root of 1662066239 is about 40768.4466100930. The cubic root of 1662066239 is about 1184.5392142256.

The spelling of 1662066239 in words is "one billion, six hundred sixty-two million, sixty-six thousand, two hundred thirty-nine".