161687067 has 16 divisors (see below), whose sum is σ = 222814368. Its totient is φ = 104222720.

The previous prime is 161687059. The next prime is 161687083. The reversal of 161687067 is 760786161.

It is a cyclic number.

It is not a de Polignac number, because 161687067 - 2³ = 161687059 is a prime.

It is a super-2 number, since 2×161687067² = 52285415270124978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161687087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8083 + ... + 19715.

It is an arithmetic number, because the mean of its divisors is an integer number (13925898).

Almost surely, 2^161687067 is an apocalyptic number.

161687067 is a deficient number, since it is larger than the sum of its proper divisors (61127301).

161687067 is a wasteful number, since it uses less digits than its factorization.

161687067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11790.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 161687067 is about 12715.6229497418. The cubic root of 161687067 is about 544.7849411000.

The spelling of 161687067 in words is "one hundred sixty-one million, six hundred eighty-seven thousand, sixty-seven".