1664862233 has 4 divisors (see below), whose sum is σ = 1681026048. Its totient is φ = 1648698420.

The previous prime is 1664862229. The next prime is 1664862253. The reversal of 1664862233 is 3322684661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3322684661 = 1847 ⋅1798963.

It is a cyclic number.

It is not a de Polignac number, because 1664862233 - 2² = 1664862229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664862253) 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, 8081753 + ... + 8081958.

It is an arithmetic number, because the mean of its divisors is an integer number (420256512).

Almost surely, 2^1664862233 is an apocalyptic number.

It is an amenable number.

1664862233 is a deficient number, since it is larger than the sum of its proper divisors (16163815).

1664862233 is a wasteful number, since it uses less digits than its factorization.

1664862233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16163814.

The product of its digits is 248832, while the sum is 41.

The square root of 1664862233 is about 40802.7233527371. The cubic root of 1664862233 is about 1185.2030684529.

The spelling of 1664862233 in words is "one billion, six hundred sixty-four million, eight hundred sixty-two thousand, two hundred thirty-three".