6646914976020 has 144 divisors (see below), whose sum is σ = 20668017136704. Its totient is φ = 1594761062400.

The previous prime is 6646914976001. The next prime is 6646914976043. The reversal of 6646914976020 is 206794196466.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4015126 + ... + 5423565.

Almost surely, 2^{6646914976020} is an apocalyptic number.

6646914976020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6646914976020 is an abundant number, since it is smaller than the sum of its proper divisors (14021102160684).

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

6646914976020 is a wasteful number, since it uses less digits than its factorization.

6646914976020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9438822 (or 9438809 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 60.

The spelling of 6646914976020 in words is "six trillion, six hundred forty-six billion, nine hundred fourteen million, nine hundred seventy-six thousand, twenty".