665435425387 has 2 divisors, whose sum is σ = 665435425388. Its totient is φ = 665435425386.

The previous prime is 665435425357. The next prime is 665435425409. The reversal of 665435425387 is 783524534566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665435425387 - 2¹¹ = 665435423339 is a prime.

It is not a weakly prime, because it can be changed into another prime (665435425357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332717712693 + 332717712694.

It is an arithmetic number, because the mean of its divisors is an integer number (332717712694).

Almost surely, 2^665435425387 is an apocalyptic number.

665435425387 is a deficient number, since it is larger than the sum of its proper divisors (1).

665435425387 is an equidigital number, since it uses as much as digits as its factorization.

665435425387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576000, while the sum is 58.

The spelling of 665435425387 in words is "six hundred sixty-five billion, four hundred thirty-five million, four hundred twenty-five thousand, three hundred eighty-seven".