1668208272 has 40 divisors (see below), whose sum is σ = 4311316320. Its totient is φ = 555840000.

The previous prime is 1668208247. The next prime is 1668208309. The reversal of 1668208272 is 2728028661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142647 + ... + 153897.

It is an arithmetic number, because the mean of its divisors is an integer number (107782908).

Almost surely, 2^1668208272 is an apocalyptic number.

1668208272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1668208272 is an abundant number, since it is smaller than the sum of its proper divisors (2643108048).

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

1668208272 is a wasteful number, since it uses less digits than its factorization.

1668208272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14351 (or 14345 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1668208272 is about 40843.7054146658. The cubic root of 1668208272 is about 1185.9965438921.

The spelling of 1668208272 in words is "one billion, six hundred sixty-eight million, two hundred eight thousand, two hundred seventy-two".