1664280229 has 16 divisors (see below), whose sum is σ = 1824615936. Its totient is φ = 1511193600.

The previous prime is 1664280223. The next prime is 1664280251. The reversal of 1664280229 is 9220824661.

It is a cyclic number.

It is not a de Polignac number, because 1664280229 - 2⁵ = 1664280197 is a prime.

It is a super-3 number, since 3×1664280229³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1664280191 and 1664280200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664280223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172914 + ... + 182284.

It is an arithmetic number, because the mean of its divisors is an integer number (114038496).

Almost surely, 2^1664280229 is an apocalyptic number.

It is an amenable number.

1664280229 is a deficient number, since it is larger than the sum of its proper divisors (160335707).

1664280229 is a wasteful number, since it uses less digits than its factorization.

1664280229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9756.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1664280229 is about 40795.5908034189. The cubic root of 1664280229 is about 1185.0649442470.

The spelling of 1664280229 in words is "one billion, six hundred sixty-four million, two hundred eighty thousand, two hundred twenty-nine".