6621074281920 has 224 divisors, whose sum is σ = 25438279108608. Its totient is φ = 1424365535232.

The previous prime is 6621074281907. The next prime is 6621074281931. The reversal of 6621074281920 is 291824701266.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6621074281920.

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, 28864552 + ... + 29093031.

Almost surely, 2^{6621074281920} is an apocalyptic number.

6621074281920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6621074281920 is an abundant number, since it is smaller than the sum of its proper divisors (18817204826688).

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

6621074281920 is a wasteful number, since it uses less digits than its factorization.

6621074281920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57957627 (or 57957617 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 6621074281920 in words is "six trillion, six hundred twenty-one billion, seventy-four million, two hundred eighty-one thousand, nine hundred twenty".