161366887 has 16 divisors (see below), whose sum is σ = 179448192. Its totient is φ = 143874720.

The previous prime is 161366861. The next prime is 161366893. The reversal of 161366887 is 788663161.

It is not a de Polignac number, because 161366887 - 2¹¹ = 161364839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161366897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274608 + ... + 275194.

It is an arithmetic number, because the mean of its divisors is an integer number (11215512).

Almost surely, 2^161366887 is an apocalyptic number.

161366887 is a deficient number, since it is larger than the sum of its proper divisors (18081305).

161366887 is a wasteful number, since it uses less digits than its factorization.

161366887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038.

The product of its digits is 290304, while the sum is 46.

The square root of 161366887 is about 12703.0266865814. The cubic root of 161366887 is about 544.4251009263.

The spelling of 161366887 in words is "one hundred sixty-one million, three hundred sixty-six thousand, eight hundred eighty-seven".