6665400846 has 64 divisors (see below), whose sum is σ = 16322423040. Its totient is φ = 2003188320.

The previous prime is 6665400829. The next prime is 6665400871. The reversal of 6665400846 is 6480045666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80220 + ... + 140591.

It is an arithmetic number, because the mean of its divisors is an integer number (255037860).

Almost surely, 2^6665400846 is an apocalyptic number.

6665400846 is an abundant number, since it is smaller than the sum of its proper divisors (9657022194).

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

6665400846 is a wasteful number, since it uses less digits than its factorization.

6665400846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220878 (or 220872 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 6665400846 is about 81641.9061879376. The cubic root of 6665400846 is about 1881.9529319368.

The spelling of 6665400846 in words is "six billion, six hundred sixty-five million, four hundred thousand, eight hundred forty-six".