665745150451 has 2 divisors, whose sum is σ = 665745150452. Its totient is φ = 665745150450.

The previous prime is 665745150311. The next prime is 665745150467. The reversal of 665745150451 is 154051547566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665745150451 - 2³¹ = 663597666803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665745150395 and 665745150404.

It is not a weakly prime, because it can be changed into another prime (665745151451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332872575225 + 332872575226.

It is an arithmetic number, because the mean of its divisors is an integer number (332872575226).

Almost surely, 2^665745150451 is an apocalyptic number.

665745150451 is a deficient number, since it is larger than the sum of its proper divisors (1).

665745150451 is an equidigital number, since it uses as much as digits as its factorization.

665745150451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520000, while the sum is 49.

The spelling of 665745150451 in words is "six hundred sixty-five billion, seven hundred forty-five million, one hundred fifty thousand, four hundred fifty-one".