2165020667 has 8 divisors (see below), whose sum is σ = 2170380096. Its totient is φ = 2159669512.

The previous prime is 2165020619. The next prime is 2165020729. The reversal of 2165020667 is 7660205612.

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 2165020667 - 2⁸ = 2165020411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165028667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079888 + ... + 1081890.

It is an arithmetic number, because the mean of its divisors is an integer number (271297512).

Almost surely, 2^2165020667 is an apocalyptic number.

2165020667 is a deficient number, since it is larger than the sum of its proper divisors (5359429).

2165020667 is a wasteful number, since it uses less digits than its factorization.

2165020667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 2165020667 is about 46529.7825806225. The cubic root of 2165020667 is about 1293.6615852451.

The spelling of 2165020667 in words is "two billion, one hundred sixty-five million, twenty thousand, six hundred sixty-seven".