161101666 has 16 divisors (see below), whose sum is σ = 266234688. Its totient is φ = 72502000.

The previous prime is 161101657. The next prime is 161101687. The reversal of 161101666 is 666101161.

161101666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34030 + ... + 38473.

It is an arithmetic number, because the mean of its divisors is an integer number (16639668).

Almost surely, 2^161101666 is an apocalyptic number.

161101666 is a deficient number, since it is larger than the sum of its proper divisors (105133022).

161101666 is a wasteful number, since it uses less digits than its factorization.

161101666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72617.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 161101666 is about 12692.5831098323. The cubic root of 161101666 is about 544.1266668169.

The spelling of 161101666 in words is "one hundred sixty-one million, one hundred one thousand, six hundred sixty-six".