2193665660 has 12 divisors (see below), whose sum is σ = 4606697928. Its totient is φ = 877466256.

The previous prime is 2193665651. The next prime is 2193665671. The reversal of 2193665660 is 665663912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54841622 + ... + 54841661.

It is an arithmetic number, because the mean of its divisors is an integer number (383891494).

Almost surely, 2^2193665660 is an apocalyptic number.

2193665660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2193665660 is an abundant number, since it is smaller than the sum of its proper divisors (2413032268).

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

2193665660 is a wasteful number, since it uses less digits than its factorization.

2193665660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109683292 (or 109683290 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 2193665660 is about 46836.5846321014. The cubic root of 2193665660 is about 1299.3420062638.

The spelling of 2193665660 in words is "two billion, one hundred ninety-three million, six hundred sixty-five thousand, six hundred sixty".