1664310311 has 4 divisors (see below), whose sum is σ = 1664394072. Its totient is φ = 1664226552.

The previous prime is 1664310287. The next prime is 1664310407. The reversal of 1664310311 is 1130134661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1664310311 - 2²⁶ = 1597201447 is a prime.

It is a super-2 number, since 2×1664310311² = 5539857622601833442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664310211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6740 + ... + 58086.

It is an arithmetic number, because the mean of its divisors is an integer number (416098518).

Almost surely, 2^1664310311 is an apocalyptic number.

1664310311 is a deficient number, since it is larger than the sum of its proper divisors (83761).

1664310311 is an equidigital number, since it uses as much as digits as its factorization.

1664310311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83760.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1664310311 is about 40795.9594935577. The cubic root of 1664310311 is about 1185.0720842523.

Adding to 1664310311 its reverse (1130134661), we get a palindrome (2794444972).

The spelling of 1664310311 in words is "one billion, six hundred sixty-four million, three hundred ten thousand, three hundred eleven".