1668033261 has 12 divisors (see below), whose sum is σ = 2417132640. Its totient is φ = 1108444680.

The previous prime is 1668033239. The next prime is 1668033293. The reversal of 1668033261 is 1623308661.

It is not a de Polignac number, because 1668033261 - 2¹⁵ = 1668000493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668033361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295171 + ... + 300768.

It is an arithmetic number, because the mean of its divisors is an integer number (201427720).

Almost surely, 2^1668033261 is an apocalyptic number.

It is an amenable number.

1668033261 is a deficient number, since it is larger than the sum of its proper divisors (749099379).

1668033261 is a wasteful number, since it uses less digits than its factorization.

1668033261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596256 (or 596253 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1668033261 is about 40841.5629108388. The cubic root of 1668033261 is about 1185.9550683155.

The spelling of 1668033261 in words is "one billion, six hundred sixty-eight million, thirty-three thousand, two hundred sixty-one".