161236666 has 8 divisors (see below), whose sum is σ = 243339264. Its totient is φ = 80123580.

The previous prime is 161236657. The next prime is 161236681. The reversal of 161236666 is 666632161.

161236666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246970 + ... + 247621.

It is an arithmetic number, because the mean of its divisors is an integer number (30417408).

Almost surely, 2^161236666 is an apocalyptic number.

161236666 is a deficient number, since it is larger than the sum of its proper divisors (82102598).

161236666 is a wasteful number, since it uses less digits than its factorization.

161236666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494756.

The product of its digits is 46656, while the sum is 37.

The square root of 161236666 is about 12697.9000626088. The cubic root of 161236666 is about 544.2786134993.

The spelling of 161236666 in words is "one hundred sixty-one million, two hundred thirty-six thousand, six hundred sixty-six".