1668020486 has 16 divisors (see below), whose sum is σ = 2734868880. Its totient is φ = 756696480.

The previous prime is 1668020483. The next prime is 1668020491. The reversal of 1668020486 is 6840208661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668020483) 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 7 ways as a sum of consecutive naturals, for example, 63281 + ... + 85676.

It is an arithmetic number, because the mean of its divisors is an integer number (170929305).

Almost surely, 2^1668020486 is an apocalyptic number.

1668020486 is a deficient number, since it is larger than the sum of its proper divisors (1066848394).

1668020486 is a wasteful number, since it uses less digits than its factorization.

1668020486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149479.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 1668020486 is about 40841.4065134882. The cubic root of 1668020486 is about 1185.9520406751.

The spelling of 1668020486 in words is "one billion, six hundred sixty-eight million, twenty thousand, four hundred eighty-six".