6641202021 has 8 divisors (see below), whose sum is σ = 8889392064. Its totient is φ = 4410240000.

The previous prime is 6641202019. The next prime is 6641202041. The reversal of 6641202021 is 1202021466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6641202021 - 2¹ = 6641202019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6641201982 and 6641202000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641202041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4306105 + ... + 4307646.

It is an arithmetic number, because the mean of its divisors is an integer number (1111174008).

Almost surely, 2^6641202021 is an apocalyptic number.

It is an amenable number.

6641202021 is a deficient number, since it is larger than the sum of its proper divisors (2248190043).

6641202021 is a wasteful number, since it uses less digits than its factorization.

6641202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8614011.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 6641202021 is about 81493.5704273656. The cubic root of 6641202021 is about 1879.6726853020.

Adding to 6641202021 its reverse (1202021466), we get a palindrome (7843223487).

The spelling of 6641202021 in words is "six billion, six hundred forty-one million, two hundred two thousand, twenty-one".