162205661 has 4 divisors (see below), whose sum is σ = 162257472. Its totient is φ = 162153852.

The previous prime is 162205657. The next prime is 162205709. The reversal of 162205661 is 166502261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166502261 = 5483 ⋅30367.

It is a cyclic number.

It is not a de Polignac number, because 162205661 - 2² = 162205657 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 (162205621) 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, 20885 + ... + 27578.

It is an arithmetic number, because the mean of its divisors is an integer number (40564368).

Almost surely, 2^162205661 is an apocalyptic number.

It is an amenable number.

162205661 is a deficient number, since it is larger than the sum of its proper divisors (51811).

162205661 is an equidigital number, since it uses as much as digits as its factorization.

162205661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51810.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 162205661 is about 12735.9986259421. The cubic root of 162205661 is about 545.3667660016.

The spelling of 162205661 in words is "one hundred sixty-two million, two hundred five thousand, six hundred sixty-one".