1661122167 has 8 divisors (see below), whose sum is σ = 2252369280. Its totient is φ = 1088644920.

The previous prime is 1661122157. The next prime is 1661122181. The reversal of 1661122167 is 7612211661.

1661122167 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1661122167 - 2⁷ = 1661122039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661122157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4692259 + ... + 4692612.

It is an arithmetic number, because the mean of its divisors is an integer number (281546160).

Almost surely, 2^1661122167 is an apocalyptic number.

1661122167 is a deficient number, since it is larger than the sum of its proper divisors (591247113).

1661122167 is an equidigital number, since it uses as much as digits as its factorization.

1661122167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9384933.

The product of its digits is 6048, while the sum is 33.

The square root of 1661122167 is about 40756.8665012412. The cubic root of 1661122167 is about 1184.3148946248.

The spelling of 1661122167 in words is "one billion, six hundred sixty-one million, one hundred twenty-two thousand, one hundred sixty-seven".