1668899101 has 8 divisors (see below), whose sum is σ = 1715178080. Its totient is φ = 1622959632.

The previous prime is 1668899087. The next prime is 1668899107. The reversal of 1668899101 is 1019988661.

It is a happy number.

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 1668899101 - 2⁵ = 1668899069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668899107) 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, 74895 + ... + 94588.

It is an arithmetic number, because the mean of its divisors is an integer number (214397260).

Almost surely, 2^1668899101 is an apocalyptic number.

It is an amenable number.

1668899101 is a deficient number, since it is larger than the sum of its proper divisors (46278979).

1668899101 is a wasteful number, since it uses less digits than its factorization.

1668899101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169755.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 1668899101 is about 40852.1615217604. The cubic root of 1668899101 is about 1186.1602340318.

The spelling of 1668899101 in words is "one billion, six hundred sixty-eight million, eight hundred ninety-nine thousand, one hundred one".