2168416660 has 24 divisors (see below), whose sum is σ = 4554871776. Its totient is φ = 867138720.

The previous prime is 2168416643. The next prime is 2168416693. The reversal of 2168416660 is 666148612.

It is a happy number.

It is a super-2 number, since 2×2168416660² = 9404061622731111200, which contains 22 as substring.

It is a congruent 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, 78475 + ... + 102445.

It is an arithmetic number, because the mean of its divisors is an integer number (189786324).

Almost surely, 2^2168416660 is an apocalyptic number.

2168416660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2168416660 is an abundant number, since it is smaller than the sum of its proper divisors (2386455116).

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

2168416660 is a wasteful number, since it uses less digits than its factorization.

2168416660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28503 (or 28501 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 2168416660 is about 46566.2609622031. The cubic root of 2168416660 is about 1294.3376327769.

The spelling of 2168416660 in words is "two billion, one hundred sixty-eight million, four hundred sixteen thousand, six hundred sixty".