1668668370 has 16 divisors (see below), whose sum is σ = 4004804160. Its totient is φ = 444978224.

The previous prime is 1668668347. The next prime is 1668668459. The reversal of 1668668370 is 738668661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27811110 + ... + 27811169.

It is an arithmetic number, because the mean of its divisors is an integer number (250300260).

Almost surely, 2^1668668370 is an apocalyptic number.

1668668370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668668370 is an abundant number, since it is smaller than the sum of its proper divisors (2336135790).

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

1668668370 is a wasteful number, since it uses less digits than its factorization.

1668668370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55622289.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 1668668370 is about 40849.3374487274. The cubic root of 1668668370 is about 1186.1055679447.

The spelling of 1668668370 in words is "one billion, six hundred sixty-eight million, six hundred sixty-eight thousand, three hundred seventy".