66425240723 has 2 divisors, whose sum is σ = 66425240724. Its totient is φ = 66425240722.

The previous prime is 66425240699. The next prime is 66425240729. The reversal of 66425240723 is 32704252466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66425240723 - 2⁶ = 66425240659 is a prime.

It is not a weakly prime, because it can be changed into another prime (66425240729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212620361 + 33212620362.

It is an arithmetic number, because the mean of its divisors is an integer number (33212620362).

Almost surely, 2^66425240723 is an apocalyptic number.

66425240723 is a deficient number, since it is larger than the sum of its proper divisors (1).

66425240723 is an equidigital number, since it uses as much as digits as its factorization.

66425240723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 41.

The spelling of 66425240723 in words is "sixty-six billion, four hundred twenty-five million, two hundred forty thousand, seven hundred twenty-three".