1666160001 has 24 divisors (see below), whose sum is σ = 2686528416. Its totient is φ = 986307840.

The previous prime is 1666159991. The next prime is 1666160003. The reversal of 1666160001 is 1000616661.

It is not a de Polignac number, because 1666160001 - 2⁵ = 1666159969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1666160003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191440 + ... + 199953.

It is an arithmetic number, because the mean of its divisors is an integer number (111938684).

Almost surely, 2^1666160001 is an apocalyptic number.

1666160001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1666160001 is a deficient number, since it is larger than the sum of its proper divisors (1020368415).

1666160001 is a wasteful number, since it uses less digits than its factorization.

1666160001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391453 (or 391450 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1666160001 is about 40818.6232129404. The cubic root of 1666160001 is about 1185.5109456056.

Adding to 1666160001 its reverse (1000616661), we get a palindrome (2666776662).

The spelling of 1666160001 in words is "one billion, six hundred sixty-six million, one hundred sixty thousand, one".