1668612855 has 64 divisors (see below), whose sum is σ = 3428812800. Its totient is φ = 673491456.

The previous prime is 1668612839. The next prime is 1668612899. The reversal of 1668612855 is 5582168661.

It is not a de Polignac number, because 1668612855 - 2⁴ = 1668612839 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4821 + ... + 57969.

It is an arithmetic number, because the mean of its divisors is an integer number (53575200).

Almost surely, 2^1668612855 is an apocalyptic number.

1668612855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1668612855 is an abundant number, since it is smaller than the sum of its proper divisors (1760199945).

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

1668612855 is a wasteful number, since it uses less digits than its factorization.

1668612855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53200.

The product of its digits is 691200, while the sum is 48.

The square root of 1668612855 is about 40848.6579338906. The cubic root of 1668612855 is about 1186.0924142664.

The spelling of 1668612855 in words is "one billion, six hundred sixty-eight million, six hundred twelve thousand, eight hundred fifty-five".