1666060161 has 16 divisors (see below), whose sum is σ = 2296583808. Its totient is φ = 1073520000.

The previous prime is 1666060147. The next prime is 1666060199. The reversal of 1666060161 is 1610606661.

It is not a de Polignac number, because 1666060161 - 2¹⁵ = 1666027393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1666060111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32940 + ... + 66461.

It is an arithmetic number, because the mean of its divisors is an integer number (143536488).

Almost surely, 2^1666060161 is an apocalyptic number.

It is an amenable number.

1666060161 is a deficient number, since it is larger than the sum of its proper divisors (630523647).

1666060161 is a wasteful number, since it uses less digits than its factorization.

1666060161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99592.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1666060161 is about 40817.4002234341. The cubic root of 1666060161 is about 1185.4872656515.

The spelling of 1666060161 in words is "one billion, six hundred sixty-six million, sixty thousand, one hundred sixty-one".