1666233020 has 24 divisors (see below), whose sum is σ = 3535166544. Its totient is φ = 659621376.

The previous prime is 1666233017. The next prime is 1666233047. The reversal of 1666233020 is 203326661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427502 + ... + 431381.

It is an arithmetic number, because the mean of its divisors is an integer number (147298606).

Almost surely, 2^1666233020 is an apocalyptic number.

1666233020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666233020 is an abundant number, since it is smaller than the sum of its proper divisors (1868933524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666233020 is a wasteful number, since it uses less digits than its factorization.

1666233020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858989 (or 858987 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 1666233020 is about 40819.5176355625. The cubic root of 1666233020 is about 1185.5282635821.

Adding to 1666233020 its reverse (203326661), we get a palindrome (1869559681).

The spelling of 1666233020 in words is "one billion, six hundred sixty-six million, two hundred thirty-three thousand, twenty".