6620533631 has 8 divisors (see below), whose sum is σ = 6883987584. Its totient is φ = 6360197760.

The previous prime is 6620533613. The next prime is 6620533681. The reversal of 6620533631 is 1363350266.

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

It is a cyclic number.

It is not a de Polignac number, because 6620533631 - 2¹⁸ = 6620271487 is a prime.

It is a super-2 number, since 2×6620533631² = 87662931118404088322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6620533591 and 6620533600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620533681) 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, 775190 + ... + 783683.

It is an arithmetic number, because the mean of its divisors is an integer number (860498448).

Almost surely, 2^6620533631 is an apocalyptic number.

6620533631 is a deficient number, since it is larger than the sum of its proper divisors (263453953).

6620533631 is a wasteful number, since it uses less digits than its factorization.

6620533631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559041.

The product of its (nonzero) digits is 58320, while the sum is 35.

The square root of 6620533631 is about 81366.6616680321. The cubic root of 6620533631 is about 1877.7207203853.

Adding to 6620533631 its reverse (1363350266), we get a palindrome (7983883897).

The spelling of 6620533631 in words is "six billion, six hundred twenty million, five hundred thirty-three thousand, six hundred thirty-one".