162156661 has 4 divisors (see below), whose sum is σ = 167748300. Its totient is φ = 156565024.

The previous prime is 162156641. The next prime is 162156667. The reversal of 162156661 is 166651261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28291761 + 133864900 = 5319^2 + 11570^2 .

It is a cyclic number.

It is not a de Polignac number, because 162156661 - 2²³ = 153768053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162156667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2795776 + ... + 2795833.

It is an arithmetic number, because the mean of its divisors is an integer number (41937075).

Almost surely, 2^162156661 is an apocalyptic number.

It is an amenable number.

162156661 is a deficient number, since it is larger than the sum of its proper divisors (5591639).

162156661 is an equidigital number, since it uses as much as digits as its factorization.

162156661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5591638.

The product of its digits is 12960, while the sum is 34.

The square root of 162156661 is about 12734.0747995290. The cubic root of 162156661 is about 545.3118446491.

The spelling of 162156661 in words is "one hundred sixty-two million, one hundred fifty-six thousand, six hundred sixty-one".