6674981021 has 4 divisors (see below), whose sum is σ = 6741070044. Its totient is φ = 6608892000.

The previous prime is 6674981017. The next prime is 6674981051. The reversal of 6674981021 is 1201894766.

6674981021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6259024996 + 415956025 = 79114^2 + 20395^2 .

It is a cyclic number.

It is not a de Polignac number, because 6674981021 - 2² = 6674981017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6674981051) 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, 33044360 + ... + 33044561.

It is an arithmetic number, because the mean of its divisors is an integer number (1685267511).

Almost surely, 2^6674981021 is an apocalyptic number.

It is an amenable number.

6674981021 is a deficient number, since it is larger than the sum of its proper divisors (66089023).

6674981021 is a wasteful number, since it uses less digits than its factorization.

6674981021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66089022.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 6674981021 is about 81700.5570421647. The cubic root of 6674981021 is about 1882.8541434237.

The spelling of 6674981021 in words is "six billion, six hundred seventy-four million, nine hundred eighty-one thousand, twenty-one".