165506427707 has 2 divisors, whose sum is σ = 165506427708. Its totient is φ = 165506427706.

The previous prime is 165506427703. The next prime is 165506427721. The reversal of 165506427707 is 707724605561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165506427707 - 2² = 165506427703 is a prime.

It is a super-2 number, since 2×165506427707² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165506427703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82753213853 + 82753213854.

It is an arithmetic number, because the mean of its divisors is an integer number (82753213854).

Almost surely, 2^165506427707 is an apocalyptic number.

165506427707 is a deficient number, since it is larger than the sum of its proper divisors (1).

165506427707 is an equidigital number, since it uses as much as digits as its factorization.

165506427707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 50.

The spelling of 165506427707 in words is "one hundred sixty-five billion, five hundred six million, four hundred twenty-seven thousand, seven hundred seven".