161006866 has 8 divisors (see below), whose sum is σ = 246648960. Its totient is φ = 78790548.

The previous prime is 161006863. The next prime is 161006873. The reversal of 161006866 is 668600161.

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

It is not an unprimeable number, because it can be changed into a prime (161006863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856326 + ... + 856513.

It is an arithmetic number, because the mean of its divisors is an integer number (30831120).

Almost surely, 2^161006866 is an apocalyptic number.

161006866 is a deficient number, since it is larger than the sum of its proper divisors (85642094).

161006866 is a wasteful number, since it uses less digits than its factorization.

161006866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712888.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 161006866 is about 12688.8480958675. The cubic root of 161006866 is about 544.0199157393.

The spelling of 161006866 in words is "one hundred sixty-one million, six thousand, eight hundred sixty-six".