1662204101 has 2 divisors, whose sum is σ = 1662204102. Its totient is φ = 1662204100.

The previous prime is 1662204091. The next prime is 1662204119. The reversal of 1662204101 is 1014022661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1006792900 + 655411201 = 31730^2 + 25601^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662204101 - 2¹⁴ = 1662187717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662204301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831102050 + 831102051.

It is an arithmetic number, because the mean of its divisors is an integer number (831102051).

Almost surely, 2^1662204101 is an apocalyptic number.

It is an amenable number.

1662204101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662204101 is an equidigital number, since it uses as much as digits as its factorization.

1662204101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1662204101 is about 40770.1373679314. The cubic root of 1662204101 is about 1184.5719643103.

Adding to 1662204101 its reverse (1014022661), we get a palindrome (2676226762).

The spelling of 1662204101 in words is "one billion, six hundred sixty-two million, two hundred four thousand, one hundred one".