6721420446 has 32 divisors (see below), whose sum is σ = 16085452320. Its totient is φ = 2068129152.

The previous prime is 6721420439. The next prime is 6721420483. The reversal of 6721420446 is 6440241276.

6721420446 is a `hidden beast` number, since 6 + 72 + 142 + 0 + 446 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6721420446.

It is a congruent number.

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, 4786635 + ... + 4788038.

It is an arithmetic number, because the mean of its divisors is an integer number (502670385).

Almost surely, 2^6721420446 is an apocalyptic number.

6721420446 is an abundant number, since it is smaller than the sum of its proper divisors (9364031874).

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

6721420446 is a wasteful number, since it uses less digits than its factorization.

6721420446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9574697 (or 9574691 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 6721420446 is about 81984.2695033627. The cubic root of 6721420446 is about 1887.2105436631.

The spelling of 6721420446 in words is "six billion, seven hundred twenty-one million, four hundred twenty thousand, four hundred forty-six".