5999866640 has 40 divisors (see below), whose sum is σ = 14080080960. Its totient is φ = 2377513856.

The previous prime is 5999866633. The next prime is 5999866673. The reversal of 5999866640 is 466689995.

It is a tau number, because it is divible by the number of its divisors (40).

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, 341900 + ... + 359019.

It is an arithmetic number, because the mean of its divisors is an integer number (352002024).

Almost surely, 2^5999866640 is an apocalyptic number.

It is an amenable number.

5999866640 is an abundant number, since it is smaller than the sum of its proper divisors (8080214320).

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

5999866640 is a wasteful number, since it uses less digits than its factorization.

5999866640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701039 (or 701033 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 62.

The square root of 5999866640 is about 77458.8060842665. The cubic root of 5999866640 is about 1817.1071298878.

The spelling of 5999866640 in words is "five billion, nine hundred ninety-nine million, eight hundred sixty-six thousand, six hundred forty".