6641925427 has 2 divisors, whose sum is σ = 6641925428. Its totient is φ = 6641925426.

The previous prime is 6641925401. The next prime is 6641925431. The reversal of 6641925427 is 7245291466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6641925427 is a prime.

It is not a weakly prime, because it can be changed into another prime (6641923427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320962713 + 3320962714.

It is an arithmetic number, because the mean of its divisors is an integer number (3320962714).

Almost surely, 2^6641925427 is an apocalyptic number.

6641925427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641925427 is an equidigital number, since it uses as much as digits as its factorization.

6641925427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The square root of 6641925427 is about 81498.0087302751. The cubic root of 6641925427 is about 1879.7409318396.

The spelling of 6641925427 in words is "six billion, six hundred forty-one million, nine hundred twenty-five thousand, four hundred twenty-seven".