1516669668 has 36 divisors (see below), whose sum is σ = 3957477888. Its totient is φ = 489247920.

The previous prime is 1516669667. The next prime is 1516669673. The reversal of 1516669668 is 8669666151.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1516669667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678396 + ... + 680627.

Almost surely, 2^1516669668 is an apocalyptic number.

1516669668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1516669668 is an abundant number, since it is smaller than the sum of its proper divisors (2440808220).

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

1516669668 is a wasteful number, since it uses less digits than its factorization.

1516669668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359064 (or 1359059 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 1516669668 is about 38944.4433520368. The cubic root of 1516669668 is about 1148.9390765007.

The spelling of 1516669668 in words is "one billion, five hundred sixteen million, six hundred sixty-nine thousand, six hundred sixty-eight".