1668229963 has 16 divisors (see below), whose sum is σ = 1778176000. Its totient is φ = 1560619872.

The previous prime is 1668229949. The next prime is 1668229993. The reversal of 1668229963 is 3699228661.

It is not a de Polignac number, because 1668229963 - 2²⁵ = 1634675531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1668229963.

It is not an unprimeable number, because it can be changed into a prime (1668229903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551068 + ... + 554086.

It is an arithmetic number, because the mean of its divisors is an integer number (111136000).

Almost surely, 2^1668229963 is an apocalyptic number.

1668229963 is a deficient number, since it is larger than the sum of its proper divisors (109946037).

1668229963 is a wasteful number, since it uses less digits than its factorization.

1668229963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394.

The product of its digits is 1679616, while the sum is 52.

The square root of 1668229963 is about 40843.9709504353. The cubic root of 1668229963 is about 1186.0016842054.

The spelling of 1668229963 in words is "one billion, six hundred sixty-eight million, two hundred twenty-nine thousand, nine hundred sixty-three".