1662201311 has 2 divisors, whose sum is σ = 1662201312. Its totient is φ = 1662201310.

The previous prime is 1662201293. The next prime is 1662201403. The reversal of 1662201311 is 1131022661.

It is a weak prime.

It is an emirp because it is prime and its reverse (1131022661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662201311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662201511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831100655 + 831100656.

It is an arithmetic number, because the mean of its divisors is an integer number (831100656).

Almost surely, 2^1662201311 is an apocalyptic number.

1662201311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662201311 is an equidigital number, since it uses as much as digits as its factorization.

1662201311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1662201311 is about 40770.1031516968. The cubic root of 1662201311 is about 1184.5713015441.

Adding to 1662201311 its reverse (1131022661), we get a palindrome (2793223972).

The spelling of 1662201311 in words is "one billion, six hundred sixty-two million, two hundred one thousand, three hundred eleven".