6642064426660 has 48 divisors (see below), whose sum is σ = 15078399469056. Its totient is φ = 2443129610112.

The previous prime is 6642064426637. The next prime is 6642064426691. The reversal of 6642064426660 is 666244602466.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 6642064426598 and 6642064426607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48498924 + ... + 48635683.

It is an arithmetic number, because the mean of its divisors is an integer number (314133322272).

Almost surely, 2^{6642064426660} is an apocalyptic number.

It is an amenable number.

6642064426660 is an abundant number, since it is smaller than the sum of its proper divisors (8436335042396).

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

6642064426660 is a wasteful number, since it uses less digits than its factorization.

6642064426660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97134892 (or 97134890 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 52.

The spelling of 6642064426660 in words is "six trillion, six hundred forty-two billion, sixty-four million, four hundred twenty-six thousand, six hundred sixty".