1668500109 has 12 divisors (see below), whose sum is σ = 2514841056. Its totient is φ = 1063970952.

The previous prime is 1668500107. The next prime is 1668500131. The reversal of 1668500109 is 9010058661.

1668500109 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1668500109 - 2¹ = 1668500107 is a prime.

It is a super-2 number, since 2×1668500109² = 5567785227466023762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668500101) 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, 4029987 + ... + 4030400.

It is an arithmetic number, because the mean of its divisors is an integer number (209570088).

Almost surely, 2^1668500109 is an apocalyptic number.

It is an amenable number.

1668500109 is a deficient number, since it is larger than the sum of its proper divisors (846340947).

1668500109 is a wasteful number, since it uses less digits than its factorization.

1668500109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8060416 (or 8060413 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1668500109 is about 40847.2778652385. The cubic root of 1668500109 is about 1186.0656994242.

The spelling of 1668500109 in words is "one billion, six hundred sixty-eight million, five hundred thousand, one hundred nine".