165466635506 has 16 divisors (see below), whose sum is σ = 248415121944. Its totient is φ = 82661625984.

The previous prime is 165466635487. The next prime is 165466635533. The reversal of 165466635506 is 605536664561.

165466635506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 45341314225 + 120125321281 = 212935^2 + 346591^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23000246 + ... + 23007438.

Almost surely, 2^165466635506 is an apocalyptic number.

165466635506 is a deficient number, since it is larger than the sum of its proper divisors (82948486438).

165466635506 is a wasteful number, since it uses less digits than its factorization.

165466635506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565.

The product of its (nonzero) digits is 11664000, while the sum is 53.

The spelling of 165466635506 in words is "one hundred sixty-five billion, four hundred sixty-six million, six hundred thirty-five thousand, five hundred six".