6336636421 has 8 divisors (see below), whose sum is σ = 6466757024. Its totient is φ = 6207561360.

The previous prime is 6336636379. The next prime is 6336636433. The reversal of 6336636421 is 1246366336.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6336636421 is a prime.

It is a super-2 number, since 2×6336636421² = 80305922263887378482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6336636451) 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, 249135 + ... + 273388.

It is an arithmetic number, because the mean of its divisors is an integer number (808344628).

Almost surely, 2^6336636421 is an apocalyptic number.

It is an amenable number.

6336636421 is a deficient number, since it is larger than the sum of its proper divisors (130120603).

6336636421 is a wasteful number, since it uses less digits than its factorization.

6336636421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522771.

The product of its digits is 279936, while the sum is 40.

The square root of 6336636421 is about 79602.9925379693. The cubic root of 6336636421 is about 1850.4879570896.

The spelling of 6336636421 in words is "six billion, three hundred thirty-six million, six hundred thirty-six thousand, four hundred twenty-one".