161500667 has 4 divisors (see below), whose sum is σ = 161531496. Its totient is φ = 161469840.

The previous prime is 161500657. The next prime is 161500711. The reversal of 161500667 is 766005161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161500667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161500657) 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, 5378 + ... + 18759.

It is an arithmetic number, because the mean of its divisors is an integer number (40382874).

Almost surely, 2^161500667 is an apocalyptic number.

161500667 is a deficient number, since it is larger than the sum of its proper divisors (30829).

161500667 is an equidigital number, since it uses as much as digits as its factorization.

161500667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30828.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 161500667 is about 12708.2912698757. The cubic root of 161500667 is about 544.5755098760.

The spelling of 161500667 in words is "one hundred sixty-one million, five hundred thousand, six hundred sixty-seven".