665470027679 has 2 divisors, whose sum is σ = 665470027680. Its totient is φ = 665470027678.

The previous prime is 665470027669. The next prime is 665470027763. The reversal of 665470027679 is 976720074566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665470027679 - 2³² = 661175060383 is a prime.

It is a super-2 number, since 2×665470027679² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665470027669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332735013839 + 332735013840.

It is an arithmetic number, because the mean of its divisors is an integer number (332735013840).

Almost surely, 2^665470027679 is an apocalyptic number.

665470027679 is a deficient number, since it is larger than the sum of its proper divisors (1).

665470027679 is an equidigital number, since it uses as much as digits as its factorization.

665470027679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26671680, while the sum is 59.

The spelling of 665470027679 in words is "six hundred sixty-five billion, four hundred seventy million, twenty-seven thousand, six hundred seventy-nine".