6641000623 has 2 divisors, whose sum is σ = 6641000624. Its totient is φ = 6641000622.

The previous prime is 6641000617. The next prime is 6641000677. The reversal of 6641000623 is 3260001466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6641000623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6641000591 and 6641000600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6641090623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320500311 + 3320500312.

It is an arithmetic number, because the mean of its divisors is an integer number (3320500312).

Almost surely, 2^6641000623 is an apocalyptic number.

6641000623 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641000623 is an equidigital number, since it uses as much as digits as its factorization.

6641000623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 6641000623 is about 81492.3347499628. The cubic root of 6641000623 is about 1879.6536844171.

The spelling of 6641000623 in words is "six billion, six hundred forty-one million, six hundred twenty-three", and thus it is an aban number.