6646997360 has 20 divisors (see below), whose sum is σ = 15454269048. Its totient is φ = 2658798912.

The previous prime is 6646997341. The next prime is 6646997369. The reversal of 6646997360 is 637996466.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6646997296 and 6646997305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646997369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41543654 + ... + 41543813.

Almost surely, 2^6646997360 is an apocalyptic number.

It is an amenable number.

6646997360 is an abundant number, since it is smaller than the sum of its proper divisors (8807271688).

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

6646997360 is a wasteful number, since it uses less digits than its factorization.

6646997360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83087480 (or 83087474 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 56.

The square root of 6646997360 is about 81529.1197057837. The cubic root of 6646997360 is about 1880.2192818010.

The spelling of 6646997360 in words is "six billion, six hundred forty-six million, nine hundred ninety-seven thousand, three hundred sixty".