666101161 has 8 divisors (see below), whose sum is σ = 733851648. Its totient is φ = 599550000.

The previous prime is 666101159. The next prime is 666101173. The reversal of 666101161 is 161101666.

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

It is a cyclic number.

It is not a de Polignac number, because 666101161 - 2¹ = 666101159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666101561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298665 + ... + 300886.

It is an arithmetic number, because the mean of its divisors is an integer number (91731456).

Almost surely, 2^666101161 is an apocalyptic number.

It is an amenable number.

666101161 is a deficient number, since it is larger than the sum of its proper divisors (67750487).

666101161 is a wasteful number, since it uses less digits than its factorization.

666101161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599663.

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

The square root of 666101161 is about 25808.9356812713. The cubic root of 666101161 is about 873.3333875098. Note that the first 4 decimals are identical.

The spelling of 666101161 in words is "six hundred sixty-six million, one hundred one thousand, one hundred sixty-one".