1664380233 has 6 divisors (see below), whose sum is σ = 2404104794. Its totient is φ = 1109586816.

The previous prime is 1664380219. The next prime is 1664380241. The reversal of 1664380233 is 3320834661.

1664380233 is a `hidden beast` number, since 1 + 6 + 643 + 8 + 0 + 2 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1503267984 + 161112249 = 38772^2 + 12693^2 .

It is not a de Polignac number, because 1664380233 - 2⁶ = 1664380169 is a prime.

It is a super-2 number, since 2×1664380233² = 5540323120002268578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664380633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92465560 + ... + 92465577.

Almost surely, 2^1664380233 is an apocalyptic number.

It is an amenable number.

1664380233 is a deficient number, since it is larger than the sum of its proper divisors (739724561).

1664380233 is a wasteful number, since it uses less digits than its factorization.

1664380233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184931143 (or 184931140 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 1664380233 is about 40796.8164566796. The cubic root of 1664380233 is about 1185.0886800055.

The spelling of 1664380233 in words is "one billion, six hundred sixty-four million, three hundred eighty thousand, two hundred thirty-three".