161312667 has 8 divisors (see below), whose sum is σ = 218729280. Its totient is φ = 105718920.

The previous prime is 161312629. The next prime is 161312687. The reversal of 161312667 is 766213161.

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

It is not a de Polignac number, because 161312667 - 2⁷ = 161312539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161312687) 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, 455509 + ... + 455862.

It is an arithmetic number, because the mean of its divisors is an integer number (27341160).

Almost surely, 2^161312667 is an apocalyptic number.

161312667 is a deficient number, since it is larger than the sum of its proper divisors (57416613).

161312667 is an equidigital number, since it uses as much as digits as its factorization.

161312667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911433.

The product of its digits is 9072, while the sum is 33.

The square root of 161312667 is about 12700.8923702234. The cubic root of 161312667 is about 544.3641176678.

The spelling of 161312667 in words is "one hundred sixty-one million, three hundred twelve thousand, six hundred sixty-seven".