2143666064 has 40 divisors (see below), whose sum is σ = 4194547008. Its totient is φ = 1061251200.

The previous prime is 2143666061. The next prime is 2143666073. The reversal of 2143666064 is 4606663412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2143666061) 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, 837074 + ... + 839630.

Almost surely, 2^2143666064 is an apocalyptic number.

It is an amenable number.

2143666064 is a deficient number, since it is larger than the sum of its proper divisors (2050880944).

2143666064 is a wasteful number, since it uses less digits than its factorization.

2143666064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 2143666064 is about 46299.7415111575. The cubic root of 2143666064 is about 1289.3941958491.

The spelling of 2143666064 in words is "two billion, one hundred forty-three million, six hundred sixty-six thousand, sixty-four".