161164666 has 8 divisors (see below), whose sum is σ = 260342964. Its totient is φ = 74383680.

The previous prime is 161164643. The next prime is 161164667. The reversal of 161164666 is 666461161.

It can be written as a sum of positive squares in 2 ways, for example, as 156875625 + 4289041 = 12525^2 + 2071^2 .

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 (161164667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3099295 + ... + 3099346.

Almost surely, 2^161164666 is an apocalyptic number.

161164666 is a deficient number, since it is larger than the sum of its proper divisors (99178298).

161164666 is a wasteful number, since it uses less digits than its factorization.

161164666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6198656.

The product of its digits is 31104, while the sum is 37.

The square root of 161164666 is about 12695.0646315803. The cubic root of 161164666 is about 544.1975858280.

The spelling of 161164666 in words is "one hundred sixty-one million, one hundred sixty-four thousand, six hundred sixty-six".