1666101165 has 16 divisors (see below), whose sum is σ = 2806065600. Its totient is φ = 841819392.

The previous prime is 1666101161. The next prime is 1666101181. The reversal of 1666101165 is 5611016661.

It is not a de Polignac number, because 1666101165 - 2² = 1666101161 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666101161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2922700 + ... + 2923269.

It is an arithmetic number, because the mean of its divisors is an integer number (175379100).

Almost surely, 2^1666101165 is an apocalyptic number.

1666101165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1666101165 is a deficient number, since it is larger than the sum of its proper divisors (1139964435).

1666101165 is a wasteful number, since it uses less digits than its factorization.

1666101165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5845996.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1666101165 is about 40817.9025061308. The cubic root of 1666101165 is about 1185.4969910548.

It can be divided in two parts, 1666 and 101165, that added together give a triangular number (102831 = T₄₅₃).

The spelling of 1666101165 in words is "one billion, six hundred sixty-six million, one hundred one thousand, one hundred sixty-five".