165627409669 has 2 divisors, whose sum is σ = 165627409670. Its totient is φ = 165627409668.

The previous prime is 165627409663. The next prime is 165627409709. The reversal of 165627409669 is 966904726561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165315428100 + 311981569 = 406590^2 + 17663^2 .

It is an emirp because it is prime and its reverse (966904726561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165627409669 - 2¹³ = 165627401477 is a prime.

It is a super-2 number, since 2×165627409669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165627409663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82813704834 + 82813704835.

It is an arithmetic number, because the mean of its divisors is an integer number (82813704835).

Almost surely, 2^165627409669 is an apocalyptic number.

It is an amenable number.

165627409669 is a deficient number, since it is larger than the sum of its proper divisors (1).

165627409669 is an equidigital number, since it uses as much as digits as its factorization.

165627409669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 165627409669 in words is "one hundred sixty-five billion, six hundred twenty-seven million, four hundred nine thousand, six hundred sixty-nine".