162741661 has 4 divisors (see below), whose sum is σ = 167991424. Its totient is φ = 157491900.

The previous prime is 162741643. The next prime is 162741671. The reversal of 162741661 is 166147261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 162741661 - 2⁹ = 162741149 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 (162741611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2624835 + ... + 2624896.

It is an arithmetic number, because the mean of its divisors is an integer number (41997856).

Almost surely, 2^162741661 is an apocalyptic number.

It is an amenable number.

162741661 is a deficient number, since it is larger than the sum of its proper divisors (5249763).

162741661 is an equidigital number, since it uses as much as digits as its factorization.

162741661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249762.

The product of its digits is 12096, while the sum is 34.

The square root of 162741661 is about 12757.0239868082. The cubic root of 162741661 is about 545.9668173870.

The spelling of 162741661 in words is "one hundred sixty-two million, seven hundred forty-one thousand, six hundred sixty-one".