161427667 has 4 divisors (see below), whose sum is σ = 169923880. Its totient is φ = 152931456.

The previous prime is 161427649. The next prime is 161427671. The reversal of 161427667 is 766724161.

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

It is not a de Polignac number, because 161427667 - 2²³ = 153039059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161427647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4248078 + ... + 4248115.

It is an arithmetic number, because the mean of its divisors is an integer number (42480970).

Almost surely, 2^161427667 is an apocalyptic number.

161427667 is a deficient number, since it is larger than the sum of its proper divisors (8496213).

161427667 is an equidigital number, since it uses as much as digits as its factorization.

161427667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496212.

The product of its digits is 84672, while the sum is 40.

The square root of 161427667 is about 12705.4188045889. The cubic root of 161427667 is about 544.4934462243.

The spelling of 161427667 in words is "one hundred sixty-one million, four hundred twenty-seven thousand, six hundred sixty-seven".