1662066223 has 2 divisors, whose sum is σ = 1662066224. Its totient is φ = 1662066222.

The previous prime is 1662066137. The next prime is 1662066239. The reversal of 1662066223 is 3226602661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1662066223 - 2¹³ = 1662058031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662063223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831033111 + 831033112.

It is an arithmetic number, because the mean of its divisors is an integer number (831033112).

Almost surely, 2^1662066223 is an apocalyptic number.

1662066223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662066223 is an equidigital number, since it uses as much as digits as its factorization.

1662066223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 1662066223 is about 40768.4464138628. The cubic root of 1662066223 is about 1184.5392104245.

Adding to 1662066223 its reverse (3226602661), we get a palindrome (4888668884).

The spelling of 1662066223 in words is "one billion, six hundred sixty-two million, sixty-six thousand, two hundred twenty-three".