1666651283 has 8 divisors (see below), whose sum is σ = 1831247040. Its totient is φ = 1504235880.

The previous prime is 1666651267. The next prime is 1666651297. The reversal of 1666651283 is 3821566661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1666651283 - 2⁴ = 1666651267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666651223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543485 + ... + 546542.

It is an arithmetic number, because the mean of its divisors is an integer number (228905880).

Almost surely, 2^1666651283 is an apocalyptic number.

1666651283 is a deficient number, since it is larger than the sum of its proper divisors (164595757).

1666651283 is a wasteful number, since it uses less digits than its factorization.

1666651283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090177.

The product of its digits is 311040, while the sum is 44.

The square root of 1666651283 is about 40824.6406352830. The cubic root of 1666651283 is about 1185.6274536147.

The spelling of 1666651283 in words is "one billion, six hundred sixty-six million, six hundred fifty-one thousand, two hundred eighty-three".