1668485541 has 8 divisors (see below), whose sum is σ = 2228088384. Its totient is φ = 1110603200.

The previous prime is 1668485509. The next prime is 1668485543. The reversal of 1668485541 is 1455848661.

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 1668485541 - 2⁵ = 1668485509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668485543) 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, 427860 + ... + 431741.

It is an arithmetic number, because the mean of its divisors is an integer number (278511048).

Almost surely, 2^1668485541 is an apocalyptic number.

It is an amenable number.

1668485541 is a deficient number, since it is larger than the sum of its proper divisors (559602843).

1668485541 is an equidigital number, since it uses as much as digits as its factorization.

1668485541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860251.

The product of its digits is 921600, while the sum is 48.

The square root of 1668485541 is about 40847.0995420728. The cubic root of 1668485541 is about 1186.0622474905.

The spelling of 1668485541 in words is "one billion, six hundred sixty-eight million, four hundred eighty-five thousand, five hundred forty-one".